diff --git a/.github/workflows/macosx_cpn.yml b/.github/workflows/macosx_cpn.yml
index f24d6c029db..78227d6563a 100644
--- a/.github/workflows/macosx_cpn.yml
+++ b/.github/workflows/macosx_cpn.yml
@@ -30,7 +30,7 @@ on:
 env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
   BUILD_TYPE: Release
-  QT_VERSION: "5.12.9"
+  QT_VERSION: "5.15.2"
 
 jobs:
   build:
@@ -71,27 +71,27 @@ jobs:
         run: python3 -m pip install --upgrade pip Pillow lz4 clang jinja2
 
       - name: Patch GitHub macOS build
-        run: brew install pkg-config
+        run:  brew install pkg-config
 
       - name: Install libusb
-        run:   wget https://github.com/libusb/libusb/releases/download/v1.0.20/libusb-1.0.20.tar.bz2 &&
-          export MACOSX_DEPLOYMENT_TARGET=10.9 &&
-          tar xfv libusb-1.0.20.tar.bz2 &&
-          cd libusb-1.0.20 &&
-          ./configure &&
-          make install &&
-          cd ..
+        run:  brew install libusb
 
       - name: Install dfu-util
-        run:   wget https://downloads.sourceforge.net/project/dfu-util/dfu-util-0.9.tar.gz &&
-          tar xfv dfu-util-0.9.tar.gz &&
-          cd dfu-util-0.9 &&
-          ./configure &&
-          make install
+        run:  brew install dfu-util
+
+      - name: Select XCode version
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: '13.2.1'
 
       - name: Install SDL2
         run:  brew install SDL2
 
+      - name: Select XCode version
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: '11.7'
+
       - name: Build
         working-directory: ${{github.workspace}}
         shell: bash
diff --git a/.github/workflows/win-cpn-32.yml b/.github/workflows/win-cpn-32.yml
index 770183149c3..74b54a13bc9 100644
--- a/.github/workflows/win-cpn-32.yml
+++ b/.github/workflows/win-cpn-32.yml
@@ -17,9 +17,9 @@ env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
   BUILD_TYPE: Release
   CMAKE_GENERATOR: "MSYS Makefiles"
-  QT_VERSION: "5.12.9"
-  MINGW_VERSION: "win32_mingw73"
-  MINGW_PATH: "mingw73_32"
+  QT_VERSION: "5.15.2"
+  MINGW_VERSION: "win32_mingw81"
+  MINGW_PATH: "mingw81_32"
 
 jobs:
   build:
@@ -56,7 +56,9 @@ jobs:
                                 mingw-w64-i686-libraqm \
                                 mingw-w64-i686-SDL2 \
                                 mingw-w64-i686-clang \
-                                mingw-w64-i686-nsis
+                                mingw-w64-i686-nsis \
+                                mingw-w64-i686-dfu-util \
+                                mingw-w64-i686-openssl
           python -m pip install clang jinja2
 
       - name: Install Qt
@@ -66,7 +68,6 @@ jobs:
           cache-key-prefix: 'install-qt-action-win32'
           version: ${{ env.QT_VERSION }}
           arch: ${{ env.MINGW_VERSION }}
-          tools: 'tools_openssl_x86'
 
       - name: Check out the repo
         uses: actions/checkout@v3
@@ -79,7 +80,6 @@ jobs:
         run: |
           mkdir output && \
           CMAKE_PREFIX_PATH=$RUNNER_WORKSPACE/Qt/$QT_VERSION/$MINGW_PATH \
-          QT_TOOLS_OPENSSL_ROOT_PATH=$RUNNER_WORKSPACE/Qt/Tools/OpenSSL/Win_x86 \
           tools/build-companion.sh "$(pwd)" "$(pwd)/output/"
       - name: Compose release filename
         # https://stackoverflow.com/questions/58033366/how-to-get-current-branch-within-github-actions
diff --git a/.github/workflows/win_cpn-64.yml b/.github/workflows/win_cpn-64.yml
index bb660ef30ea..8287e450900 100644
--- a/.github/workflows/win_cpn-64.yml
+++ b/.github/workflows/win_cpn-64.yml
@@ -31,9 +31,9 @@ env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
   BUILD_TYPE: Release
   CMAKE_GENERATOR: "MSYS Makefiles"
-  QT_VERSION: "5.12.9"
-  MINGW_VERSION: "win64_mingw73"
-  MINGW_PATH: "mingw73_64"
+  QT_VERSION: "5.15.2"
+  MINGW_VERSION: "win64_mingw81"
+  MINGW_PATH: "mingw81_64"
 
 jobs:
   build:
@@ -70,7 +70,9 @@ jobs:
                                 mingw-w64-x86_64-libraqm \
                                 mingw-w64-x86_64-SDL2 \
                                 mingw-w64-x86_64-clang \
-                                mingw-w64-x86_64-nsis
+                                mingw-w64-x86_64-nsis \
+                                mingw-w64-x86_64-dfu-util \
+                                mingw-w64-x86_64-openssl
           python -m pip install clang jinja2
 
       - name: Install Qt
@@ -80,7 +82,6 @@ jobs:
           cache-key-prefix: 'install-qt-action-win64'
           version: ${{ env.QT_VERSION }}
           arch: ${{ env.MINGW_VERSION }}
-          tools: 'tools_openssl_x64'
 
       - name: Check out the repo
         uses: actions/checkout@v3
@@ -93,7 +94,6 @@ jobs:
         run: |
           mkdir output && \
           CMAKE_PREFIX_PATH=$RUNNER_WORKSPACE/Qt/$QT_VERSION/$MINGW_PATH \
-          QT_TOOLS_OPENSSL_ROOT_PATH=$RUNNER_WORKSPACE/Qt/Tools/OpenSSL/Win_x64 \
           tools/build-companion.sh "$(pwd)" "$(pwd)/output/"
 
       - name: Compose release filename
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 06c96d374c4..8109f5f723e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,7 +47,7 @@ if(EdgeTX_SUPERBUILD)
 
   # Add explicit targets for triggering cmake in the external projects
   set_property(DIRECTORY PROPERTY EP_STEP_TARGETS configure clean)
-  
+
   # Native targets
   ExternalProject_Add(native
     SOURCE_DIR ${CMAKE_SOURCE_DIR}
@@ -136,7 +136,7 @@ if(NATIVE_BUILD)
   include(NativeTargets)
 else()
   # Prevent CMake warnings
-  set(IGNORE "${SDL2_LIBRARY_PATH}")
+  set(IGNORE "${SDL2_LIBRARY_PATH}" "${LIBSSL1_ROOT_DIR}" "${OPENSSL_ROOT_DIR}")
 endif()
 
 add_subdirectory(${RADIO_SRC_DIR})
diff --git a/cmake/FindDfuutil.cmake b/cmake/FindDfuutil.cmake
new file mode 100644
index 00000000000..cf75d5d0c9c
--- /dev/null
+++ b/cmake/FindDfuutil.cmake
@@ -0,0 +1,25 @@
+# - try to find program dfu-util
+
+set(DFU_UTIL_ROOT_DIR
+	"${DFU_UTIL_ROOT_DIR}"
+	CACHE
+	PATH
+  "Root directory to search for dfu-util")
+
+find_program(DFU_UTIL_PROGRAM
+  NAMES
+    dfu-util
+  HINTS
+    "${DFU_UTIL_ROOT_DIR}")
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(DFU_UTIL
+	DEFAULT_MSG
+	DFU_UTIL_PROGRAM)
+
+if(DFU_UTIL_FOUND)
+  set(DFU_UTIL_PATH "${DFU_UTIL_PROGRAM}")
+  mark_as_advanced(DFU_UTIL_ROOT_DIR)
+endif()
+
+mark_as_advanced(DFU_UTIL_PROGRAM)
diff --git a/cmake/FindLibssl1.cmake b/cmake/FindLibssl1.cmake
new file mode 100644
index 00000000000..38041481ecb
--- /dev/null
+++ b/cmake/FindLibssl1.cmake
@@ -0,0 +1,27 @@
+# - try to find libssl-1 library
+
+if (DEFINED ENV{LIBSSL1_ROOT_DIR})
+  set(LIBSSL1_ROOT_DIR "$ENV{LIBSSL1_ROOT_DIR}")
+endif()
+
+find_library(LIBSSL1_LIBRARY
+	NAMES
+    libssl.so.1.1
+    libssl-1_1.dll
+    libssl-1_1.dylib
+  HINTS
+    "${LIBSSL1_ROOT_DIR}")
+
+get_filename_component(LIBSSL1_LIBRARY_PATH ${LIBSSL1_LIBRARY} PATH)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LIBSSL1
+	DEFAULT_MSG
+	LIBSSL1_LIBRARY_PATH)
+
+if(LIBSSL1_FOUND)
+	set(LIBSSL1_LIBRARY_DIR "${LIBSSL1_LIBRARY_PATH}")
+	mark_as_advanced(LIBSSL1_ROOT_DIR)
+endif()
+
+mark_as_advanced(LIBSSL1_LIBRARY_PATH)
diff --git a/cmake/FindLibusb1.cmake b/cmake/FindLibusb1.cmake
new file mode 100644
index 00000000000..bb91e846d69
--- /dev/null
+++ b/cmake/FindLibusb1.cmake
@@ -0,0 +1,31 @@
+# - try to find libusb-1 library
+
+set(LIBUSB1_ROOT_DIR
+	"${LIBUSB1_ROOT_DIR}"
+	CACHE
+	PATH
+	"Root directory to search for libusb-1")
+
+find_library(LIBUSB1_LIBRARY
+	NAMES
+    libusb-1.0
+    libusb-1.0.so
+    libusb-1.0.so.0
+    libusb-1.0.dll
+    libusb-1.0.dylib
+  HINTS
+    "${LIBUSB1_ROOT_DIR}")
+
+get_filename_component(LIBUSB1_LIBRARY_PATH ${LIBUSB1_LIBRARY} PATH)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LIBUSB1
+	DEFAULT_MSG
+	LIBUSB1_LIBRARY_PATH)
+
+if(LIBUSB1_FOUND)
+	set(LIBUSB1_LIBRARY_DIR "${LIBUSB1_LIBRARY_PATH}")
+	mark_as_advanced(LIBUSB1_ROOT_DIR)
+endif()
+
+mark_as_advanced(LIBUSB1_LIBRARY_PATH)
diff --git a/cmake/NativeTargets.cmake b/cmake/NativeTargets.cmake
index dce9f8888ae..ceb10da2d66 100644
--- a/cmake/NativeTargets.cmake
+++ b/cmake/NativeTargets.cmake
@@ -23,12 +23,40 @@ if(Qt5Core_FOUND OR FOX_FOUND)
   set(SDL2_BUILDING_LIBRARY YES)  # this prevents FindSDL from appending SDLmain lib to the results, which we don't want
   find_package("SDL2")
   if(SDL2_FOUND)
-    message(STATUS "SDL2 Lib: ${SDL2_LIBRARIES}; Headers: ${SDL2_INCLUDE_DIRS}")
+    # find_package("SDL2") does not set a variable holding the path to the location of the SDL2 shared library
+    find_file(SDL2_LIB_PATH
+              NAMES
+                libSDL2.so
+                SDL2.dll
+                SDL2.dylib
+              HINTS
+                "/usr/lib/x86_64-linux-gnu"
+                ${SDL2_LIBRARY_PATH})
+    message(STATUS "SDL2 Lib: ${SDL2_LIB_PATH} Libs: ${SDL2_LIBRARIES}; Headers: ${SDL2_INCLUDE_DIRS}")
   else()
-    message(STATUS "SDL not found! Simulator audio, and joystick inputs, will not work.")
+    message(STATUS "SDL2 not found! Simulator audio, and joystick inputs, will not work.")
   endif()
 endif()
 
+if(Qt5Core_FOUND AND NOT DISABLE_COMPANION)
+  find_package(Libusb1)
+  if(LIBUSB1_FOUND)
+    find_package(Dfuutil)
+  endif()
+
+  if(LINUX)
+    find_package(Libssl1)
+  endif()
+
+  # OpenSSL
+  # environment variable set in github workflows and build-edgetx Dockerfile
+  if (DEFINED ENV{OPENSSL_ROOT_DIR})
+    set(OPENSSL_ROOT_DIR "$ENV{OPENSSL_ROOT_DIR}")
+  endif()
+
+  find_package(OpenSSL)
+endif()
+
 # Windows-specific includes and libs shared by sub-projects
 if(WIN32)
   list(APPEND WIN_INCLUDE_DIRS "${RADIO_SRC_DIR}/thirdparty/windows/dirent")
diff --git a/companion/src/CMakeLists.txt b/companion/src/CMakeLists.txt
index 2cbef76434b..c623a69a268 100644
--- a/companion/src/CMakeLists.txt
+++ b/companion/src/CMakeLists.txt
@@ -1,16 +1,19 @@
 set(SIMULATOR_INSTALL_PREFIX "" CACHE STRING "Alternative simulator library search path")
 
 if(${CMAKE_SYSTEM_NAME} MATCHES "(Linux|FreeBSD)")
-  set(C9X_NAME_SUFFIX ${VERSION_MAJOR}${VERSION_MINOR})
-  set(COMPANION_NAME "companion${C9X_NAME_SUFFIX}")
-  set(SIMULATOR_NAME "simulator${C9X_NAME_SUFFIX}")
+  set(APP_NAME_SUFFIX ${VERSION_MAJOR}${VERSION_MINOR})
+  set(COMPANION_NAME "companion${APP_NAME_SUFFIX}")
+  set(SIMULATOR_NAME "simulator${APP_NAME_SUFFIX}")
+  # by default cmake sets CMAKE_INSTALL_PREFIX to /usr/local however linuxdeploy works best with '/usr' as base directory
+  if (${CMAKE_INSTALL_PREFIX} MATCHES "/usr/local")
+    set(CMAKE_INSTALL_PREFIX "/usr")
+  endif()
   if (NOT ${SIMULATOR_INSTALL_PREFIX} STREQUAL "")
     set(SIMULATOR_LIB_PATH ${SIMULATOR_INSTALL_PREFIX}/lib/${COMPANION_NAME})
   else()
     set(SIMULATOR_LIB_PATH "../lib/${COMPANION_NAME}")
   endif()
   message(STATUS "Simulators library search path: " ${SIMULATOR_LIB_PATH})
-  set(SIMULATOR_LIB_INSTALL_PATH ${CMAKE_INSTALL_PREFIX}/lib/${COMPANION_NAME})
 else()
   set(COMPANION_NAME "companion")
   set(SIMULATOR_NAME "simulator")
@@ -21,10 +24,6 @@ endif()
 # different versions for different eeproms easier, i.e. without manually renaming
 set(COMPANION_OSX_APP_BUNDLE_NAME "EdgeTX Companion ${VERSION_MAJOR}.${VERSION_MINOR}")
 
-# On OS X we copy dfu-util to the application bundle. This the path from which we copy
-# the binary (default homebrew path)
-set(DFU_UTIL_PATH "/usr/local/bin/dfu-util")
-
 option(DEBUG_STORAGE_IMPORT "Turn on debug output for storage import") # Disabled by default
 if(DEBUG_STORAGE_IMPORT)
   add_definitions(-DDEBUG_STORAGE_IMPORT)
@@ -326,43 +325,38 @@ if(POLICY CMP0026)
   cmake_policy(SET CMP0026 OLD)  # https://cmake.org/cmake/help/v3.0/policy/CMP0026.html
 endif()
 
-# OpenSSL
-# environment variable set in github workflows and build-edgetx Dockerfile
-if (DEFINED ENV{QT_TOOLS_OPENSSL_ROOT_PATH})
-  set(OPENSSL_ROOT_DIR "$ENV{QT_TOOLS_OPENSSL_ROOT_PATH}")
-else()
-  message(STATUS "Environment variable QT_TOOLS_OPENSSL_ROOT_PATH not defined. Performing default OpenSSL library search.")
-endif()
-
-find_package(OpenSSL)
+include(FindDfuutil)
+include(FindLibusb1)
+include(FindOpenSSL)
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
-  message(STATUS "install " ${CMAKE_BINARY_DIR} " to " ${CMAKE_INSTALL_PREFIX}/bin)
+if(LINUX)
+  message(STATUS "install " ${CMAKE_BINARY_DIR} " to " ${CMAKE_INSTALL_PREFIX})
   install(TARGETS ${COMPANION_NAME} DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
   install(TARGETS ${SIMULATOR_NAME} DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
-  install(DIRECTORY ${CMAKE_BINARY_DIR}/plugins/ DESTINATION ${SIMULATOR_LIB_INSTALL_PATH})
-  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/companion.desktop DESTINATION share/applications RENAME companion${C9X_NAME_SUFFIX}.desktop)
-  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/simulator.desktop DESTINATION share/applications RENAME simulator${C9X_NAME_SUFFIX}.desktop)
-  if(${CMAKE_INSTALL_PREFIX} MATCHES "/usr/local")
-    set(INSTALL_TEMP_SHR_PFX "/usr/")
-    set(INSTALL_TEMP_LIB_PFX "/")
+  install(DIRECTORY ${CMAKE_BINARY_DIR}/plugins/ DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/${COMPANION_NAME})
+  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/companion.desktop DESTINATION ${CMAKE_INSTALL_PREFIX}/share/applications RENAME companion${APP_NAME_SUFFIX}.desktop)
+  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/simulator.desktop DESTINATION ${CMAKE_INSTALL_PREFIX}/share/applications RENAME simulator${APP_NAME_SUFFIX}.desktop)
+  install(FILES images/linuxicons/16x16/companion.png DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/16x16/apps RENAME companion${APP_NAME_SUFFIX}.png)
+  install(FILES images/linuxicons/22x22/companion.png DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/22x22/apps RENAME companion${APP_NAME_SUFFIX}.png)
+  install(FILES images/linuxicons/24x24/companion.png DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/24x24/apps RENAME companion${APP_NAME_SUFFIX}.png)
+  install(FILES images/linuxicons/32x32/companion.png DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/32x32/apps RENAME companion${APP_NAME_SUFFIX}.png)
+  install(FILES images/linuxicons/48x48/companion.png DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/48x48/apps RENAME companion${APP_NAME_SUFFIX}.png)
+  install(FILES images/linuxicons/128x128/companion.png DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/128x128/apps RENAME companion${APP_NAME_SUFFIX}.png)
+  install(FILES images/linuxicons/256x256/companion.png DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/256x256/apps RENAME companion${APP_NAME_SUFFIX}.png)
+  install(FILES images/linuxicons/512x512/companion.png DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/512x512/apps RENAME companion${APP_NAME_SUFFIX}.png)
+  install(FILES images/linuxicons/scalable/companion.svg DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/scalable/apps RENAME companion${APP_NAME_SUFFIX}.svg)
+  install(FILES ../targets/linux/45-companion-taranis.rules DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/udev/rules.d RENAME 45-companion${APP_NAME_SUFFIX}-taranis.rules)
+  install(FILES ../targets/linux/45-usbasp.rules DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/udev/rules.d RENAME 45-companion${APP_NAME_SUFFIX}-usbasp.rules)
+
+  if(LIBSSL1_FOUND)
+    install(DIRECTORY ${LIBSSL1_LIBRARY_DIR}/ DESTINATION ${CMAKE_INSTALL_PREFIX}/lib FILES_MATCHING PATTERN "libcrypto.so.*" PATTERN "libssl.so.*")
   endif()
-  install(FILES images/linuxicons/16x16/companion.png DESTINATION ${INSTALL_TEMP_SHR_PFX}share/icons/hicolor/16x16/apps RENAME companion${C9X_NAME_SUFFIX}.png)
-  install(FILES images/linuxicons/22x22/companion.png DESTINATION ${INSTALL_TEMP_SHR_PFX}share/icons/hicolor/22x22/apps RENAME companion${C9X_NAME_SUFFIX}.png)
-  install(FILES images/linuxicons/24x24/companion.png DESTINATION ${INSTALL_TEMP_SHR_PFX}share/icons/hicolor/24x24/apps RENAME companion${C9X_NAME_SUFFIX}.png)
-  install(FILES images/linuxicons/32x32/companion.png DESTINATION ${INSTALL_TEMP_SHR_PFX}share/icons/hicolor/32x32/apps RENAME companion${C9X_NAME_SUFFIX}.png)
-  install(FILES images/linuxicons/48x48/companion.png DESTINATION ${INSTALL_TEMP_SHR_PFX}share/icons/hicolor/48x48/apps RENAME companion${C9X_NAME_SUFFIX}.png)
-  install(FILES images/linuxicons/128x128/companion.png DESTINATION ${INSTALL_TEMP_SHR_PFX}share/icons/hicolor/128x128/apps RENAME companion${C9X_NAME_SUFFIX}.png)
-  install(FILES images/linuxicons/256x256/companion.png DESTINATION ${INSTALL_TEMP_SHR_PFX}share/icons/hicolor/256x256/apps RENAME companion${C9X_NAME_SUFFIX}.png)
-  install(FILES images/linuxicons/512x512/companion.png DESTINATION ${INSTALL_TEMP_SHR_PFX}share/icons/hicolor/512x512/apps RENAME companion${C9X_NAME_SUFFIX}.png)
-  install(FILES images/linuxicons/scalable/companion.svg DESTINATION ${INSTALL_TEMP_SHR_PFX}share/icons/hicolor/scalable/apps RENAME companion${C9X_NAME_SUFFIX}.svg)
-  install(FILES ../targets/linux/45-companion-taranis.rules DESTINATION ${INSTALL_TEMP_LIB_PFX}lib/udev/rules.d RENAME 45-companion${C9X_NAME_SUFFIX}-taranis.rules)
-  install(FILES ../targets/linux/45-usbasp.rules DESTINATION ${INSTALL_TEMP_LIB_PFX}lib/udev/rules.d RENAME 45-companion${C9X_NAME_SUFFIX}-usbasp.rules)
-
-  if (OPENSSL_FOUND)
-    get_filename_component(OPENSSL_SSL_LIBRARY_DIR ${OPENSSL_SSL_LIBRARY} DIRECTORY)
-    # install only files Qt networking requires
-    install(DIRECTORY ${OPENSSL_SSL_LIBRARY_DIR}/ DESTINATION ${CMAKE_INSTALL_PREFIX}/lib FILES_MATCHING PATTERN "engines*" EXCLUDE PATTERN "pkg*" EXCLUDE PATTERN "*.so*")
+
+  if(LIBUSB1_FOUND)
+    install(DIRECTORY ${LIBUSB1_LIBRARY_DIR}/ DESTINATION ${CMAKE_INSTALL_PREFIX}/lib FILES_MATCHING PATTERN "libusb-1.0.so*")
+    if(DFU_UTIL_FOUND)
+      install(FILES "${DFU_UTIL_PATH}" DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
+    endif()
   endif()
 
   # Linux specific code
@@ -377,42 +371,67 @@ elseif(WIN32)
   install(TARGETS ${COMPANION_NAME} DESTINATION ${INSTALL_DESTINATION})
   install(TARGETS ${SIMULATOR_NAME} DESTINATION ${INSTALL_DESTINATION})
   install(DIRECTORY ${CMAKE_BINARY_DIR}/plugins/ DESTINATION ${INSTALL_DESTINATION})
+
   # supporting utilities
-  set(INSTALL_TEMP_FILES dfu-util.exe libusb0.dll libusb-1.0.dll license.txt)
-  foreach(tmpfile ${INSTALL_TEMP_FILES})
-    install(FILES "${COMPANION_SRC_DIRECTORY}/../targets/windows/${tmpfile}" DESTINATION ${INSTALL_DESTINATION})
-  endforeach()
+  if(LIBUSB1_FOUND)
+    if(MINGW)
+      set(LIBUSB1_LIBRARY_DIR "${LIBUSB1_LIBRARY_DIR}/../bin")
+    endif()
+
+    set(LIBUSB1_LIBRARY_FILE "${LIBUSB1_LIBRARY_DIR}/libusb-1.0.dll")
+
+    if(EXISTS "${LIBUSB1_LIBRARY_FILE}")
+      install(FILES "${LIBUSB1_LIBRARY_FILE}" DESTINATION ${INSTALL_DESTINATION})
+    endif()
+
+    if(DFU_UTIL_FOUND)
+      install(FILES "${DFU_UTIL_PATH}" DESTINATION ${INSTALL_DESTINATION})
+    endif()
+  endif()
+
+  if(OPENSSL_FOUND)
+    if ((OPENSSL_VERSION VERSION_LESS "1.2.0" AND Qt5Core_VERSION VERSION_LESS "6.0.0") OR (OPENSSL_VERSION VERSION_GREATER "3.0.0" AND Qt5Core_VERSION VERSION_GREATER_EQUAL "6.0.0"))
+      get_filename_component(OPENSSL_SSL_LIBRARY_DIR ${OPENSSL_SSL_LIBRARY} DIRECTORY)
+      if(MINGW)
+        # the dlls are stored in the bin directory
+        set(OPENSSL_SSL_LIBRARY_DIR "${OPENSSL_SSL_LIBRARY_DIR}/../bin")
+      endif()
+      if(EXISTS "${OPENSSL_SSL_LIBRARY_DIR}")
+        # install only files Qt networking requires
+        install(DIRECTORY ${OPENSSL_SSL_LIBRARY_DIR}/ DESTINATION ${INSTALL_DESTINATION} FILES_MATCHING PATTERN "libcrypto-*.dll" PATTERN "libssl-*.dll")
+      endif()
+    endif()
+  endif()
+
+  if(NOT OPENSSL_FOUND OR Qt5Core_VERSION VERSION_LESS "6.0.0")
+    if(MINGW AND $ENV{MSYSTEM} STREQUAL "MINGW32")
+      install(FILES "${COMPANION_SRC_DIRECTORY}/../targets/windows/libcrypto-1_1.dll" DESTINATION ${INSTALL_DESTINATION})
+      install(FILES "${COMPANION_SRC_DIRECTORY}/../targets/windows/libssl-1_1.dll" DESTINATION ${INSTALL_DESTINATION})
+    else()
+      # MINGW64 or assume 64 bit native
+      install(FILES "${COMPANION_SRC_DIRECTORY}/../targets/windows/libcrypto-1_1-x64.dll" DESTINATION ${INSTALL_DESTINATION})
+      install(FILES "${COMPANION_SRC_DIRECTORY}/../targets/windows/libssl-1_1-x64.dll" DESTINATION ${INSTALL_DESTINATION})
+    endif()
+  endif()
+
+  install(FILES "${COMPANION_SRC_DIRECTORY}/../targets/windows/license.txt" DESTINATION ${INSTALL_DESTINATION})
+
+  if(SDL2_FOUND AND DEFINED SDL2_LIB_PATH)
+    install(FILES "${SDL2_LIB_PATH}" DESTINATION ${INSTALL_DESTINATION})
+  endif()
 
   # Qt dlls (using windeployqt)
   ## Qt translations are already packaged into our custom qrc. Also don't need software rendering engines.
   set(wdqtopts --no-translations --no-opengl-sw --no-system-d3d-compiler --no-angle)
   if(CMAKE_BUILD_TYPE STREQUAL "Release")
-    set(wdqtopts ${wdqtopts} --release)  # release builds aren't always properly detected with mingw
+    #set(wdqtopts ${wdqtopts} --release)  # release builds aren't always properly detected with mingw
+    set(wdqtopts ${wdqtopts} --debug)  # workaround for bug in Qt 5.15 windeployqt.exe
   endif()
   set(wdqtopts ${wdqtopts} -dir "\"${INSTALL_DESTINATION}\"" "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${COMPANION_NAME}.exe" "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${SIMULATOR_NAME}.exe")
   list(JOIN wdqtopts " " wdqtopts)
 
   # Add installer command to execute windeployqt
   message(STATUS "windeployqt command: ${QT_BIN_DIR}/windeployqt.exe ${wdqtopts}")
-
-  # SDL2 dll
-  if(SDL2_FOUND AND EXISTS "${SDL2_LIBRARY_PATH}/SDL2.dll")
-    set(SDL2_DIR ${SDL2_LIBRARY_PATH})  # this is also used by NSIS installer script
-    install(FILES ${SDL2_DIR}/SDL2.dll DESTINATION ${INSTALL_DESTINATION})
-  elseif(SDL2_FOUND)
-    message(WARNING "Installer: SDL2.dll not found, set SDL2_LIBRARY_PATH manually.")
-  endif()
-
-  if (OPENSSL_FOUND)
-    get_filename_component(OPENSSL_SSL_LIBRARY_DIR ${OPENSSL_SSL_LIBRARY} DIRECTORY)
-    set(OPENSSL_BIN_DIR "${OPENSSL_SSL_LIBRARY_DIR}/../bin")
-    if (EXISTS "${OPENSSL_BIN_DIR}")
-      # install only files Qt networking requires
-      install(DIRECTORY ${OPENSSL_BIN_DIR}/ DESTINATION ${INSTALL_DESTINATION} FILES_MATCHING PATTERN "*.dll")
-    else()
-  	  message(STATUS "Installer: OpenSSL bin directory not found, dlls not bundled.")
-    endif()
-  endif()
 endif() # WIN32 install
 
 ############# Packaging ####################
@@ -442,7 +461,7 @@ if(WIN32)
   endif()
 endif()
 
-set(CPACK_PACKAGE_NAME "companion${C9X_NAME_SUFFIX}")
+set(CPACK_PACKAGE_NAME "companion${APP_NAME_SUFFIX}")
 set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Models and settings editor for the EdgeTX open source firmware")
 string(TOLOWER "${CPACK_PACKAGE_NAME}" CPACK_PACKAGE_NAME_LOWERCASE)
 
@@ -505,11 +524,18 @@ IF(APPLE)
   install(FILES ${MAC_ICON_FILE} DESTINATION ${companion_res_dir} COMPONENT Runtime)
 
   # Copy dfu-util, resolve symlink first
-  get_filename_component(DFU_UTIL_ABSOLUTE_PATH ${DFU_UTIL_PATH} REALPATH)
-  install(PROGRAMS ${DFU_UTIL_ABSOLUTE_PATH} DESTINATION ${companion_res_dir} COMPONENT Runtime)
+  if(DFU_UTIL_FOUND)
+    get_filename_component(DFU_UTIL_ABSOLUTE_PATH ${DFU_UTIL_PATH} REALPATH)
+    install(PROGRAMS ${DFU_UTIL_ABSOLUTE_PATH} DESTINATION ${companion_res_dir} COMPONENT Runtime)
 
-  set(bundle_tools_path "\${CMAKE_INSTALL_PREFIX}/${companion_res_dir}/dfu-util;")
+    set(bundle_tools_path "\${CMAKE_INSTALL_PREFIX}/${companion_res_dir}/dfu-util;")
+  endif()
 
+  if(OPENSSL_FOUND)
+    # Copy openssl, resolve symlink first
+    #get_filename_component(OPENSSL_ABSOLUTE_PATH ${OPENSSL_SSL_LIBRARY} REALPATH)
+    #install(FILES ${OPENSSL_ABSOLUTE_PATH} DESTINATION ${companion_res_dir} COMPONENT Runtime)
+  endif()
 
   # Include depencies (adding frameworks, fixing the embbeded libraries)
   # I get write errors without setting BU_CHMOD_BUNDLE_ITEMS even though it is
@@ -533,38 +559,55 @@ if(APPLE)
   set(CPACK_PACKAGE_FILE_NAME "edgetx-${CPACK_PACKAGE_NAME_LOWERCASE}-${VERSION}")
 endif(APPLE)
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
-  get_filename_component(_qt_bin_dir "${QT_QMAKE_EXECUTABLE}" DIRECTORY)
-  find_program(LINUXDEPLOY_EXECUTABLE linuxdeployqt HINTS "${_qt_bin_dir}")
+if(LINUX)
+  set(LINUXDEPLOY_APPIMAGE "linuxdeploy-x86_64.AppImage")
+  set(LINUXDEPLOY_PLUGIN_QT "linuxdeploy-plugin-qt-x86_64.AppImage")
+  set(LINUXDEPLOY_URL "https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous")
+  set(LINUXDEPLOY_PLUGIN_QT_URL "https://github.com/linuxdeploy/linuxdeploy-plugin-qt/releases/download/continuous")
+  set(LINUXDEPLOY_DIRECTORY "${CMAKE_BINARY_DIR}/linuxdeploy")
+  set(LINUXDEPLOY_APP "${LINUXDEPLOY_DIRECTORY}/usr/bin/linuxdeploy")
 
-  if(NOT LINUXDEPLOY_EXECUTABLE)
-    message(STATUS "linuxdeployqt will be downloaded")
+  if (NOT EXISTS "${LINUXDEPLOY_DIRECTORY}")
+    message(STATUS "Downloading linuxdeploy and plugins...")
 
-    set(LINUXDEPLOY_EXECUTABLE "${CMAKE_BINARY_DIR}/deployqt/AppRun")
-    set(LINUXDEPLOY_URL "https://github.com/probonopd/linuxdeployqt/releases/download/continuous/linuxdeployqt-continuous-x86_64.AppImage")
-    set(LINUXDEPLOY_BUNDLE "${CMAKE_BINARY_DIR}/linuxdeployqt.AppImage")
+    file(DOWNLOAD "${LINUXDEPLOY_URL}/${LINUXDEPLOY_APPIMAGE}" "${CMAKE_BINARY_DIR}/${LINUXDEPLOY_APPIMAGE}")
+    file(DOWNLOAD "${LINUXDEPLOY_PLUGIN_QT_URL}/${LINUXDEPLOY_PLUGIN_QT}" "${CMAKE_BINARY_DIR}/${LINUXDEPLOY_PLUGIN_QT}")
 
-    if (NOT EXISTS "${LINUXDEPLOY_EXECUTABLE}")
-      file(DOWNLOAD "${LINUXDEPLOY_URL}" "${LINUXDEPLOY_BUNDLE}")
-      execute_process(
-        COMMAND chmod +x "${LINUXDEPLOY_BUNDLE}"
-        WORKING_DIRECTORY "${CMAKE_BINARY_DIR}")
+    message(STATUS "Downloading linuxdeploy and plugins finished")
+
+    # for security reasons by default AppImages are prohibited from running in Docker containers
+    # so extract Appimage contents and run as normal apps
+
+    file(GLOB linuxdeployfiles ${CMAKE_BINARY_DIR}/linuxdeploy*.AppImage)
+
+    foreach(file ${linuxdeployfiles})
       execute_process(
-        COMMAND "${LINUXDEPLOY_BUNDLE}" --appimage-extract
+        COMMAND chmod +x "${file}"
         WORKING_DIRECTORY "${CMAKE_BINARY_DIR}")
 
-      file(REMOVE_RECURSE "${CMAKE_BINARY_DIR}/deployqt")
       execute_process(
-        COMMAND mv "${CMAKE_BINARY_DIR}/squashfs-root" deployqt
+        COMMAND "${file}" --appimage-extract
         WORKING_DIRECTORY "${CMAKE_BINARY_DIR}")
-      file(REMOVE "${LINUXDEPLOY_BUNDLE}")
-    endif()
+
+      file(REMOVE "${file}")
+    endforeach()
+
+    file(REMOVE_RECURSE "${LINUXDEPLOY_DIRECTORY}")
+
+    execute_process(
+      COMMAND mv "${CMAKE_BINARY_DIR}/squashfs-root" "${LINUXDEPLOY_DIRECTORY}"
+      WORKING_DIRECTORY "${CMAKE_BINARY_DIR}")
+
+    # test installation
+    #execute_process(
+    #  COMMAND ${LINUXDEPLOY_APP} --list-plugins
+    #  WORKING_DIRECTORY "${CMAKE_BINARY_DIR}")
   endif()
 
   set(CPACK_PACKAGE_DIRECTORY "${CMAKE_BINARY_DIR}")
   set(CPACK_GENERATOR "External")
 
-  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/CPackLinuxDeployQt.cmake.in "${CMAKE_BINARY_DIR}/CPackExternal.cmake" @ONLY)
+  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/CPackLinuxDeploy.cmake.in "${CMAKE_BINARY_DIR}/CPackExternal.cmake" @ONLY)
   set(CPACK_EXTERNAL_PACKAGE_SCRIPT "${CMAKE_BINARY_DIR}/CPackExternal.cmake")
 endif()
 
diff --git a/companion/src/CPackLinuxDeploy.cmake.in b/companion/src/CPackLinuxDeploy.cmake.in
new file mode 100644
index 00000000000..d6078067e49
--- /dev/null
+++ b/companion/src/CPackLinuxDeploy.cmake.in
@@ -0,0 +1,13 @@
+set(APP_DIR "@CPACK_PACKAGE_DIRECTORY@/_CPack_Packages/Linux/External/AppImage")
+
+execute_process(COMMAND @CMAKE_MAKE_PROGRAM@ DESTDIR=${APP_DIR} install
+                WORKING_DIRECTORY @CMAKE_BINARY_DIR@)
+
+set(cpn_desktop_file ${APP_DIR}@CMAKE_INSTALL_PREFIX@/share/applications/@COMPANION_NAME@.desktop)
+#set(icon_file ${APP_DIR}@CMAKE_INSTALL_PREFIX@/share/applications/@COMPANION_NAME@.desktop)
+
+# This is done by cmake install target
+# setup Companion application
+# add -v0 to linuxdeploy for debug info
+execute_process(COMMAND env NO_APPSTREAM=1 @LINUXDEPLOY_APP@ --appdir ${APP_DIR} -e @COMPANION_NAME@ -d ${cpn_desktop_file} --plugin qt --output appimage
+                WORKING_DIRECTORY @CMAKE_BINARY_DIR@)
diff --git a/companion/src/CPackLinuxDeployQt.cmake.in b/companion/src/CPackLinuxDeployQt.cmake.in
deleted file mode 100644
index 497d532cbfc..00000000000
--- a/companion/src/CPackLinuxDeployQt.cmake.in
+++ /dev/null
@@ -1,17 +0,0 @@
-set(APP_DIR "@CPACK_PACKAGE_DIRECTORY@/_CPack_Packages/Linux/External/AppImage")
-
-execute_process(COMMAND @CMAKE_MAKE_PROGRAM@ DESTDIR=${APP_DIR} install
-                WORKING_DIRECTORY @CMAKE_BINARY_DIR@)
-
-file(GLOB simulator_plugins "${APP_DIR}@CMAKE_INSTALL_PREFIX@/lib/@COMPANION_NAME@/*@CMAKE_SHARED_LIBRARY_SUFFIX@")
-message("Simulator plugins: ${simulator_plugins}")
-
-if(simulator_plugins)
-  list(TRANSFORM simulator_plugins PREPEND "-executable="
-    OUTPUT_VARIABLE exe_list_cmd)
-endif()
-
-message("exe_list_cmd = ${exe_list_cmd}")
-set(desktop_file ${APP_DIR}@CMAKE_INSTALL_PREFIX@/share/applications/@COMPANION_NAME@.desktop)
-execute_process(COMMAND env QMAKE=@QT_QMAKE_EXECUTABLE@ @LINUXDEPLOY_EXECUTABLE@ ${desktop_file} -appimage ${exe_list_cmd}
-                WORKING_DIRECTORY @CMAKE_BINARY_DIR@)
diff --git a/companion/src/burnconfigdialog.cpp b/companion/src/burnconfigdialog.cpp
index 43a60c7ea3e..b227e3298ae 100644
--- a/companion/src/burnconfigdialog.cpp
+++ b/companion/src/burnconfigdialog.cpp
@@ -93,7 +93,7 @@ void burnConfigDialog::getSettings()
       dfuLoc =  QFileInfo("/usr/bin/dfu-util").absoluteFilePath();
 #endif
 
-    dfuArgs = g.dfuArguments().split(" ", QString::SkipEmptyParts);
+    dfuArgs = g.dfuArguments().split(" ", Qt::SkipEmptyParts);
     armMCU = g.armMcu();
     sambaPort = g.sambaPort();
 
@@ -160,7 +160,7 @@ void burnConfigDialog::on_dfu_location_editingFinished()
 
 void burnConfigDialog::on_dfuArgs_editingFinished()
 {
-    dfuArgs = ui->dfuArgs->text().split(" ", QString::SkipEmptyParts);
+    dfuArgs = ui->dfuArgs->text().split(" ", Qt::SkipEmptyParts);
 }
 
 void burnConfigDialog::on_advCtrChkB_toggled(bool checked)
diff --git a/companion/src/companion.desktop.in b/companion/src/companion.desktop.in
index 293ad8a4b10..9b5d92aa90b 100644
--- a/companion/src/companion.desktop.in
+++ b/companion/src/companion.desktop.in
@@ -7,4 +7,4 @@ Icon=@COMPANION_NAME@
 Exec=@COMPANION_NAME@
 Terminal=false
 StartupNotify=false
-Categories=Application;
+Categories=Utility;
diff --git a/companion/src/comparedialog.cpp b/companion/src/comparedialog.cpp
index ef224251ef2..15622c1465c 100644
--- a/companion/src/comparedialog.cpp
+++ b/companion/src/comparedialog.cpp
@@ -155,7 +155,7 @@ void CompareDialog::removeModelBtnClicked()
 void CompareDialog::on_printButton_clicked()
 {
   QPrinter printer;
-  printer.setPageMargins(10.0, 10.0, 10.0, 10.0, printer.Millimeter);
+  printer.setPageMargins(QMarginsF(10.0, 10.0, 10.0, 10.0), QPageLayout::Millimeter);
   QPrintDialog * dialog = new QPrintDialog(&printer, this);
   dialog->setWindowTitle(tr("Print Document"));
   if (dialog->exec() != QDialog::Accepted)
@@ -167,9 +167,9 @@ void CompareDialog::on_printFileButton_clicked()
 {
   QPrinter printer;
   QString filename = QFileDialog::getSaveFileName(this, tr("Select PDF output file"), QString(), "Pdf File(*.pdf)");
-  printer.setPageMargins(10.0, 10.0, 10.0, 10.0, printer.Millimeter);
+  printer.setPageMargins(QMarginsF(10.0, 10.0, 10.0, 10.0), QPageLayout::Millimeter);
   printer.setOutputFormat(QPrinter::PdfFormat);
-  printer.setOrientation(QPrinter::Landscape);
+  printer.setPageOrientation(QPageLayout::Portrait);
   printer.setColorMode(QPrinter::Color);
   if (!filename.isEmpty()) {
     if (QFileInfo(filename).suffix().isEmpty())
diff --git a/companion/src/customizesplashdialog.cpp b/companion/src/customizesplashdialog.cpp
index 79e18828f72..4334db9679a 100644
--- a/companion/src/customizesplashdialog.cpp
+++ b/companion/src/customizesplashdialog.cpp
@@ -54,7 +54,7 @@ void Side::markSourceButton()
 void Side::copyImage( Side side )
 {
   if ((*source!=UNDEFINED) && (*side.source!=UNDEFINED))
-    imageLabel->setPixmap(*side.imageLabel->pixmap());
+    imageLabel->setPixmap(side.imageLabel->pixmap(Qt::ReturnByValue));
 }
 
 bool Side::displayImage(QString fileName, Source pictSource)
@@ -128,7 +128,7 @@ bool Side::saveImage()
     if (!firmware.hasSplash()) {
       return false;
     }
-    QImage image = imageLabel->pixmap()->toImage().scaled(firmware.getSplashWidth(), firmware.getSplashHeight());
+    QImage image = imageLabel->pixmap(Qt::ReturnByValue).toImage().scaled(firmware.getSplashWidth(), firmware.getSplashHeight());
     if (firmware.setSplash(image) && (firmware.save(*saveToFileName) > 0)) {
       g.flashDir( QFileInfo(*saveToFileName).dir().absolutePath() );
     }
@@ -137,7 +137,7 @@ bool Side::saveImage()
     }
   }
   else if (*source == PICT) {
-    QImage image = imageLabel->pixmap()->toImage().scaled(imageLabel->width()/2, imageLabel->height()/2).convertToFormat(QImage::Format_Indexed8);
+    QImage image = imageLabel->pixmap(Qt::ReturnByValue).toImage().scaled(imageLabel->width()/2, imageLabel->height()/2).convertToFormat(QImage::Format_Indexed8);
     if (image.save(*saveToFileName)) {
       g.imagesDir( QFileInfo(*saveToFileName).dir().absolutePath() );
     }
@@ -146,7 +146,7 @@ bool Side::saveImage()
     }
   }
   else if (*source == PROFILE) {
-    QImage image = imageLabel->pixmap()->toImage().scaled(imageLabel->width()/2, imageLabel->height()/2).convertToFormat(QImage::Format_Indexed8);
+    QImage image = imageLabel->pixmap(Qt::ReturnByValue).toImage().scaled(imageLabel->width()/2, imageLabel->height()/2).convertToFormat(QImage::Format_Indexed8);
     if (!image.save(*saveToFileName)) {
       return false;
     }
@@ -280,7 +280,7 @@ void CustomizeSplashDialog::on_leftInvertButton_clicked(){invertButton_clicked(l
 void CustomizeSplashDialog::on_rightInvertButton_clicked(){invertButton_clicked(right);}
 void CustomizeSplashDialog::invertButton_clicked(Side side)
 {
-  QImage image = side.imageLabel->pixmap()->toImage();
+  QImage image = side.imageLabel->pixmap(Qt::ReturnByValue).toImage();
   image.invertPixels();
   side.imageLabel->setPixmap(QPixmap::fromImage(image));
 }
diff --git a/companion/src/dialogs/filesyncdialog.cpp b/companion/src/dialogs/filesyncdialog.cpp
index 6a90779467d..864db3749ff 100644
--- a/companion/src/dialogs/filesyncdialog.cpp
+++ b/companion/src/dialogs/filesyncdialog.cpp
@@ -104,7 +104,7 @@ static QWidget * folderSelectorWidget(QLineEdit * le, QWidget * parent)
   l->addWidget(btn);
 
   QObject::connect(btn, &QToolButton::clicked, [=]() {
-    QString dir = QFileDialog::getExistingDirectory(parent, fsw->property("fileDialogTitle").toString(), le->text(), 0);
+    QString dir = QFileDialog::getExistingDirectory(parent, fsw->property("fileDialogTitle").toString(), le->text());
     if (!dir.isEmpty()) {
       le->setText(QDir::toNativeSeparators(dir));
       le->setFocus();
diff --git a/companion/src/firmwares/eeprominterface.cpp b/companion/src/firmwares/eeprominterface.cpp
index 7cefd6d7ee9..54ed8e1c382 100644
--- a/companion/src/firmwares/eeprominterface.cpp
+++ b/companion/src/firmwares/eeprominterface.cpp
@@ -141,7 +141,7 @@ unsigned int Firmware::getVariantNumber()
 {
   unsigned int result = 0;
   const Firmware * base = getFirmwareBase();
-  QStringList options = id.mid(base->getId().length()+1).split("-", QString::SkipEmptyParts);
+  QStringList options = id.mid(base->getId().length()+1).split("-", Qt::SkipEmptyParts);
   foreach(QString option, options) {
     foreach(OptionsGroup group, base->opts) {
       foreach(Option opt, group) {
diff --git a/companion/src/firmwares/opentx/opentxinterface.cpp b/companion/src/firmwares/opentx/opentxinterface.cpp
index b6b2badbea7..635b5a62415 100644
--- a/companion/src/firmwares/opentx/opentxinterface.cpp
+++ b/companion/src/firmwares/opentx/opentxinterface.cpp
@@ -202,14 +202,14 @@ bool OpenTxEepromInterface::loadFromByteArray(T & dest, const QByteArray & data)
   uint32_t fourcc = *((uint32_t*)&data.data()[0]);
   if (Boards::getFourCC(board) != fourcc) {
     if (IS_FAMILY_HORUS_OR_T16(board) && fourcc == 0x3178396F) {
-      qDebug() << QString().sprintf("%s: Deprecated fourcc used %x vs %x", getName(), fourcc, Boards::getFourCC(board));
+      qDebug() << QString("%1: Deprecated fourcc used %2 vs %3").arg(getName()).arg(fourcc).arg(Boards::getFourCC(board));
     }
     else {
-      qDebug() << QString().sprintf("%s: Wrong fourcc %x vs %x", getName(), fourcc, Boards::getFourCC(board));
+      qDebug() << QString("%1: Wrong fourcc %2 vs %3").arg(getName()).arg(fourcc).arg(Boards::getFourCC(board));
       return false;
     }
   }
-  qDebug() << QString().sprintf("%s: OK", getName());
+  qDebug() << QString("%1: OK").arg(getName());
   uint8_t version = data[4];
   QByteArray raw = data.right(data.size() - 8);
   return loadFromByteArray<T, M>(dest, raw, version);
diff --git a/companion/src/firmwares/radiodata.cpp b/companion/src/firmwares/radiodata.cpp
index c09dd801b75..ff642c3ce55 100644
--- a/companion/src/firmwares/radiodata.cpp
+++ b/companion/src/firmwares/radiodata.cpp
@@ -181,7 +181,7 @@ bool RadioData::renameLabel(QString from, QString to)
   }
   if (success) {
     for(auto& model : models) {
-      QStringList modelLabels = QString(model.labels).split(',',QString::SkipEmptyParts);
+      QStringList modelLabels = QString(model.labels).split(',', Qt::SkipEmptyParts);
       int ind = modelLabels.indexOf(csvFrom);
       if (ind != -1) {
         modelLabels.replace(ind, csvTo);
@@ -231,7 +231,7 @@ bool RadioData::addLabelToModel(int index, QString label)
   char *modelLabelCsv = models[index].labels;
   // Make sure it will fit
   if (strlen(modelLabelCsv) + label.size() + 1 < sizeof(models[index].labels)-1) {
-    QStringList modelLabels = QString::fromUtf8(modelLabelCsv).split(',',QString::SkipEmptyParts);
+    QStringList modelLabels = QString::fromUtf8(modelLabelCsv).split(',', Qt::SkipEmptyParts);
     if (modelLabels.indexOf(label) == -1) {
       modelLabels.append(label);
       strcpy(models[index].labels, QString(modelLabels.join(',')).toUtf8().data());
@@ -258,7 +258,7 @@ bool RadioData::removeLabelFromModel(int index, QString label)
 void RadioData::addLabelsFromModels()
 {
   for(const auto &model: models) {
-    QStringList labels = QString(model.labels).split(',',QString::SkipEmptyParts);
+    QStringList labels = QString(model.labels).split(',', Qt::SkipEmptyParts);
     foreach(QString label, labels) {
       addLabel(label);
     }
@@ -281,7 +281,7 @@ int RadioData::indexOfLabel(QString & label) const
 
 QStringList RadioData::fromCSV(const QString &csv)
 {
-  QStringList lbls = QString(csv).split(',',QString::SkipEmptyParts);
+  QStringList lbls = QString(csv).split(',', Qt::SkipEmptyParts);
   for(QString &label: lbls) {
     label = unEscapeCSV(label);
   }
diff --git a/companion/src/flashfirmwaredialog.cpp b/companion/src/flashfirmwaredialog.cpp
index 97f37f15aec..817a28de74a 100644
--- a/companion/src/flashfirmwaredialog.cpp
+++ b/companion/src/flashfirmwaredialog.cpp
@@ -227,11 +227,9 @@ void FlashFirmwareDialog::on_burnButton_clicked()
 
   if (imageSource != FIRMWARE) {
     // load the splash image
-    const QPixmap * pixmap = ui->splash->pixmap();
+    const QPixmap pixmap = ui->splash->pixmap(Qt::ReturnByValue);
     QImage image;
-    if (pixmap) {
-      image = pixmap->toImage().scaled(ui->splash->width(), ui->splash->height());
-    }
+    image = pixmap.toImage().scaled(ui->splash->width(), ui->splash->height());
     if (image.isNull()) {
       QMessageBox::critical(this, CPN_STR_TTL_WARNING, tr("Splash image not found"));
       return;
diff --git a/companion/src/helpers.cpp b/companion/src/helpers.cpp
index 1d313543298..772bb1134e1 100644
--- a/companion/src/helpers.cpp
+++ b/companion/src/helpers.cpp
@@ -264,7 +264,7 @@ void Helpers::populateFileComboBox(QComboBox * b, const QSet<QString> & set, con
 
   bool added = false;
   // Convert set into list and sort it alphabetically case insensitive
-  QStringList list = QStringList::fromSet(set);
+  QStringList list(set.begin(), set.end());
   std::sort(list.begin(), list.end(), caseInsensitiveLessThan);
   foreach (QString entry, list) {
     b->addItem(entry);
diff --git a/companion/src/labels.cpp b/companion/src/labels.cpp
index 95a7542d528..6dae2457fef 100644
--- a/companion/src/labels.cpp
+++ b/companion/src/labels.cpp
@@ -107,7 +107,7 @@ QVariant LabelsModel::data(const QModelIndex &index, int role) const
   } else if (role == Qt::CheckStateRole) {
     if (index.column() == 0 && selectedModel >= 0 &&
       selectedModel < (int)radioData->models.size()) {
-      QStringList modelLabels = QString(radioData->models.at(selectedModel).labels).split(',',QString::SkipEmptyParts);
+      QStringList modelLabels = QString(radioData->models.at(selectedModel).labels).split(',',Qt::SkipEmptyParts);
       label = RadioData::escapeCSV(label);
       return modelLabels.indexOf(label)==-1?Qt::Unchecked:Qt::Checked;
     } else if (index.column() == 0 && selectedModel == -1) {
diff --git a/companion/src/logsdialog.cpp b/companion/src/logsdialog.cpp
index 234bd35935b..f478cbca5a1 100644
--- a/companion/src/logsdialog.cpp
+++ b/companion/src/logsdialog.cpp
@@ -650,7 +650,7 @@ void LogsDialog::saveSession()
     // save the filtered records to a new file
     QString newFilename = logFilename;
     newFilename.append(QString("-Session%1.csv").arg(index));
-    QString filename = QFileDialog::getSaveFileName(this, "Save log", newFilename, "CSV files (.csv);", 0, 0); // getting the filename (full path)
+    QString filename = QFileDialog::getSaveFileName(this, "Save log", newFilename, "CSV files (.csv);"); // getting the filename (full path)
     QFile data(filename);
     if(data.open(QFile::WriteOnly |QFile::Truncate)) {
       QTextStream output(&data);
diff --git a/companion/src/modeledit/edge.cpp b/companion/src/modeledit/edge.cpp
index 49360ffdb19..e0d88372734 100644
--- a/companion/src/modeledit/edge.cpp
+++ b/companion/src/modeledit/edge.cpp
@@ -28,7 +28,7 @@
 Edge::Edge(Node *sourceNode, Node *destNode)
     : arrowSize(10)
 {
-  setAcceptedMouseButtons(0);
+  setAcceptedMouseButtons(Qt::NoButton);
   source = sourceNode;
   dest = destNode;
   source->addEdge(this);
@@ -80,7 +80,7 @@ void Edge::adjust()
   }
 }
 
-QRectF Edge::boundingRect() const 
+QRectF Edge::boundingRect() const
 {
   if (!source || !dest)
     return QRectF();
diff --git a/companion/src/modeledit/mixerslistwidget.cpp b/companion/src/modeledit/mixerslistwidget.cpp
index d44bad3ce0b..833d98eee66 100644
--- a/companion/src/modeledit/mixerslistwidget.cpp
+++ b/companion/src/modeledit/mixerslistwidget.cpp
@@ -275,7 +275,7 @@ void MixerItemViewProxyStyle::drawPrimitive(QStyle::PrimitiveElement element, co
 {
   painter->save();
   if (element == QStyle::PE_IndicatorItemViewItemDrop) {
-    painter->setRenderHint(QPainter::HighQualityAntialiasing, true);
+    painter->setRenderHint(QPainter::Antialiasing, true);
     // set a wider stroke for the drop indicator
     QPen pen(painter->pen());
     pen.setWidthF(2.25f);
diff --git a/companion/src/modeledit/setup.cpp b/companion/src/modeledit/setup.cpp
index 5335c2fdc78..345e6aed9e1 100644
--- a/companion/src/modeledit/setup.cpp
+++ b/companion/src/modeledit/setup.cpp
@@ -317,7 +317,7 @@ ModulePanel::ModulePanel(QWidget * parent, ModelData & model, ModuleData & modul
   connect(ui->multiSubType, static_cast<void(QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &ModulePanel::onSubTypeChanged);
   connect(ui->multiProtocol, static_cast<void(QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, &ModulePanel::onMultiProtocolChanged);
   connect(this, &ModulePanel::channelsRangeChanged, this, &ModulePanel::setupFailsafes);
-  connect(ui->btnGrpValueType, static_cast<void(QButtonGroup::*)(int)>(&QButtonGroup::buttonClicked), this, &ModulePanel::onFailsafesDisplayValueTypeChanged);
+  connect(ui->btnGrpValueType, static_cast<void(QButtonGroup::*)(int)>(&QButtonGroup::idClicked), this, &ModulePanel::onFailsafesDisplayValueTypeChanged);
   connect(ui->rxFreq, static_cast<void(QSpinBox::*)(int)>(&QSpinBox::valueChanged), this, &ModulePanel::onRfFreqChanged);
   connect(ui->clearRx1, SIGNAL(clicked()), this, SLOT(onClearAccessRxClicked()));
   connect(ui->clearRx2, SIGNAL(clicked()), this, SLOT(onClearAccessRxClicked()));
diff --git a/companion/src/modelslist.cpp b/companion/src/modelslist.cpp
index 20a164356f0..ff1011ad6a7 100644
--- a/companion/src/modelslist.cpp
+++ b/companion/src/modelslist.cpp
@@ -621,7 +621,7 @@ void ModelsListModel::refresh()
     }
     else {
       current = rootItem->appendChild(i);
-      current->setData(currentColumn++, QString().sprintf("%02d", i + 1));
+      current->setData(currentColumn++, QString().arg(i + 1, 2, 10, QChar('0')));
     }
 
     if (!model.isEmpty() && current) {
diff --git a/companion/src/printdialog.cpp b/companion/src/printdialog.cpp
index 65179eda970..596e30612fc 100644
--- a/companion/src/printdialog.cpp
+++ b/companion/src/printdialog.cpp
@@ -57,7 +57,7 @@ PrintDialog::~PrintDialog()
 void PrintDialog::on_printButton_clicked()
 {
   QPrinter printer;
-  printer.setPageMargins(10.0,10.0,10.0,10.0,printer.Millimeter);
+  printer.setPageMargins(QMarginsF(10.0, 10.0, 10.0, 10.0), QPageLayout::Millimeter);
   QPrintDialog *dialog = new QPrintDialog(&printer, this);
   dialog->setWindowTitle(tr("Print Document"));
   if (dialog->exec() != QDialog::Accepted)
@@ -74,7 +74,7 @@ void PrintDialog::on_printFileButton_clicked()
     fn += ".pdf"; // default
   if (fn.endsWith(".pdf", Qt::CaseInsensitive)) {
     QPrinter printer;
-    printer.setPageMargins(10.0,10.0,10.0,10.0,printer.Millimeter);
+    printer.setPageMargins(QMarginsF(10.0, 10.0, 10.0, 10.0), QPageLayout::Millimeter);
     printer.setOutputFormat(QPrinter::PdfFormat);
     printer.setColorMode(QPrinter::Color);
     printer.setOutputFileName(fn);
@@ -94,7 +94,7 @@ void PrintDialog::printToFile()
     printfilename += ".pdf"; // default
   if (printfilename.endsWith(".pdf", Qt::CaseInsensitive)) {
     QPrinter printer;
-    printer.setPageMargins(10.0,10.0,10.0,10.0,printer.Millimeter);
+    printer.setPageMargins(QMarginsF(10.0, 10.0, 10.0, 10.0), QPageLayout::Millimeter);
     printer.setOutputFormat(QPrinter::PdfFormat);
     printer.setColorMode(QPrinter::Color);
     printer.setOutputFileName(printfilename);
diff --git a/companion/src/process_sync.cpp b/companion/src/process_sync.cpp
index 6d74e654d92..5969cc5c413 100644
--- a/companion/src/process_sync.cpp
+++ b/companion/src/process_sync.cpp
@@ -67,10 +67,10 @@ SyncProcess::SyncProcess(const SyncProcess::SyncOptions & options) :
     m_dirFilters &= ~(QDir::AllDirs);
 
   if (!m_options.includeFilter.isEmpty() && m_options.includeFilter != "*")
-    m_dirIteratorFilters = m_options.includeFilter.split(',', QString::SkipEmptyParts);
+    m_dirIteratorFilters = m_options.includeFilter.split(',', Qt::SkipEmptyParts);
 
   if (!m_options.excludeFilter.isEmpty()) {
-    for (const QString & f : m_options.excludeFilter.split(',', QString::SkipEmptyParts))
+    for (const QString & f : m_options.excludeFilter.split(',', Qt::SkipEmptyParts))
       m_excludeFilters.append(QRegExp(f, ((m_dirFilters & QDir::CaseSensitive) ? Qt::CaseSensitive : Qt::CaseInsensitive), FILTER_RE_SYNTX));
   }
 
diff --git a/companion/src/simulation/debugoutput.ui b/companion/src/simulation/debugoutput.ui
index 444ef8c4480..1aa6493d692 100644
--- a/companion/src/simulation/debugoutput.ui
+++ b/companion/src/simulation/debugoutput.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>555</width>
+    <width>726</width>
     <height>733</height>
    </rect>
   </property>
@@ -121,7 +121,7 @@ To &lt;b&gt;remove a remembered entry&lt;/b&gt; from the filter  list, first cho
            <enum>QComboBox::InsertAtTop</enum>
           </property>
           <property name="sizeAdjustPolicy">
-           <enum>QComboBox::AdjustToMinimumContentsLength</enum>
+           <enum>QComboBox::AdjustToContents</enum>
           </property>
           <property name="minimumContentsLength">
            <number>1</number>
diff --git a/companion/src/simulation/radiooutputswidget.cpp b/companion/src/simulation/radiooutputswidget.cpp
index a71e3098b39..5f42ad8ae2a 100644
--- a/companion/src/simulation/radiooutputswidget.cpp
+++ b/companion/src/simulation/radiooutputswidget.cpp
@@ -230,7 +230,7 @@ void RadioOutputsWidget::setupGVarsDisplay()
   }
   QHash<int, QLabel *> fmMap;
   for (int gv=0; gv < gvars; gv++) {
-    bgrole = ((gv % 2) ? QPalette::Background : QPalette::AlternateBase);
+    bgrole = ((gv % 2) ? QPalette::Window : QPalette::AlternateBase);
     QLabel * label = new QLabel(gvarsWidget);
     label->setText(QString(tr("GV%1")).arg(gv+1));
     label->setAutoFillBackground(true);
@@ -335,7 +335,7 @@ void RadioOutputsWidget::onVirtSwValueChange(quint8 index, qint32 value)
     return;
 
   QLabel * ls = m_logicSwitchMap.value(index);
-  ls->setBackgroundRole(value ? QPalette::Dark : QPalette::Background);
+  ls->setBackgroundRole(value ? QPalette::Dark : QPalette::Window);
   ls->setForegroundRole(value ? QPalette::BrightText : QPalette::WindowText);
   ls->setFrameShadow(value ? QFrame::Sunken : QFrame::Raised);
   QFont font = ls->font();
@@ -381,7 +381,7 @@ void RadioOutputsWidget::onPhaseChanged(qint32 phase, const QString &)
       }
       else {
         fgrole =  QPalette::WindowText;
-        bgrole = ((gv.key() % 2) ? QPalette::Background : QPalette::AlternateBase);
+        bgrole = ((gv.key() % 2) ? QPalette::Window : QPalette::AlternateBase);
         font.setBold(false);
       }
       lbl->setForegroundRole(fgrole);
diff --git a/companion/src/simulation/simulateduiwidget.cpp b/companion/src/simulation/simulateduiwidget.cpp
index 8fcac00b0b1..cbb839f9172 100644
--- a/companion/src/simulation/simulateduiwidget.cpp
+++ b/companion/src/simulation/simulateduiwidget.cpp
@@ -148,7 +148,7 @@ void SimulatedUIWidget::captureScreenshot()
       path = "./";
     QDir dir(path);
     if (dir.exists() && dir.isReadable()) {
-      QStringList fwid = getCurrentFirmware()->getId().split("-", QString::SkipEmptyParts);
+      QStringList fwid = getCurrentFirmware()->getId().split("-", Qt::SkipEmptyParts);
       QString flavor = fwid.at(qMin(1, fwid.size()));
       QString fnpfx = tr("screenshot", "Simulator LCD screenshot file name prefix");
       fileName = "%1/%2_%3_%4.png";
@@ -173,7 +173,7 @@ void SimulatedUIWidget::wheelEvent(QWheelEvent * event)
 
 void SimulatedUIWidget::mousePressEvent(QMouseEvent * event)
 {
-  if (event->button() == Qt::MidButton && m_mouseMidClickAction)
+  if (event->button() == Qt::MiddleButton && m_mouseMidClickAction)
     m_mouseMidClickAction->trigger(true);
   else
     event->ignore();
@@ -181,7 +181,7 @@ void SimulatedUIWidget::mousePressEvent(QMouseEvent * event)
 
 void SimulatedUIWidget::mouseReleaseEvent(QMouseEvent * event)
 {
-  if (event->button() == Qt::MidButton && m_mouseMidClickAction)
+  if (event->button() == Qt::MiddleButton && m_mouseMidClickAction)
     m_mouseMidClickAction->trigger(false);
   else
     event->ignore();
diff --git a/companion/src/simulation/widgets/buttonswidget.h b/companion/src/simulation/widgets/buttonswidget.h
index 4fef883e6ae..b26e6ab5c9d 100644
--- a/companion/src/simulation/widgets/buttonswidget.h
+++ b/companion/src/simulation/widgets/buttonswidget.h
@@ -72,7 +72,7 @@ class ButtonsWidget : public QWidget
 
     void onMouseButtonEvent(bool press, QMouseEvent * event)
     {
-      if (!(event->button() & (Qt::LeftButton | Qt::MidButton))) {
+      if (!(event->button() & (Qt::LeftButton | Qt::MiddleButton))) {
         event->ignore();
         return;
       }
diff --git a/companion/src/simulation/widgets/radiowidget.cpp b/companion/src/simulation/widgets/radiowidget.cpp
index 9e4d9177ae4..6c33a72ea7d 100644
--- a/companion/src/simulation/widgets/radiowidget.cpp
+++ b/companion/src/simulation/widgets/radiowidget.cpp
@@ -237,6 +237,6 @@ QDebug operator << (QDebug d, const RadioWidget::RadioWidgetState & o)
 {
   QDebugStateSaver saver(d);
   d << "RadioWidget::RadioWidgetState: type=" << o.type << "; index=" << o.index
-    << "; value=" << o.value << "; flags=0x" << hex << o.flags;
+    << "; value=" << o.value << "; flags=0x" << Qt::hex << o.flags;
   return d;
 }
diff --git a/companion/src/simulator.cpp b/companion/src/simulator.cpp
index 583127619ef..518fa19f915 100644
--- a/companion/src/simulator.cpp
+++ b/companion/src/simulator.cpp
@@ -51,9 +51,9 @@ void showMessage(const QString & message, enum QMessageBox::Icon icon = QMessage
 {
   if (useConsole) {
     if (icon < QMessageBox::Warning)
-      QTextStream(stdout) << message << endl;
+      QTextStream(stdout) << message << Qt::endl;
     else
-      QTextStream(stderr) << message << endl;
+      QTextStream(stderr) << message << Qt::endl;
 
     return;
   }
@@ -70,16 +70,16 @@ const QString sharedHelpText()
   QString ret;
   QTextStream stream(&ret);
   // list all available profiles
-  stream << endl << QApplication::translate("SimulatorMain", "Available profiles:") << endl;
+  stream << Qt::endl << QApplication::translate("SimulatorMain", "Available profiles:") << Qt::endl;
   QMapIterator<int, QString> pi(g.getActiveProfiles());
   while (pi.hasNext()) {
     pi.next();
-    stream << "\t" << QApplication::translate("SimulatorMain", "ID: ") << pi.key() << "; " << QApplication::translate("SimulatorMain", "Name: ") << pi.value() << endl;
+    stream << "\t" << QApplication::translate("SimulatorMain", "ID: ") << pi.key() << "; " << QApplication::translate("SimulatorMain", "Name: ") << pi.value() << Qt::endl;
   }
   // list all available radios
-  stream << endl << QApplication::translate("SimulatorMain", "Available radios:") << endl;
+  stream << Qt::endl << QApplication::translate("SimulatorMain", "Available radios:") << Qt::endl;
   foreach(QString name, SimulatorLoader::getAvailableSimulators()) {
-    stream << "\t" << name << endl;
+    stream << "\t" << name << Qt::endl;
   }
   return ret;
 }
diff --git a/companion/src/simulator.desktop.in b/companion/src/simulator.desktop.in
index 54489a0956d..76ac1a5c536 100644
--- a/companion/src/simulator.desktop.in
+++ b/companion/src/simulator.desktop.in
@@ -7,4 +7,4 @@ Icon=@COMPANION_NAME@
 Exec=@SIMULATOR_NAME@
 Terminal=false
 StartupNotify=false
-Categories=Application;
+Categories=Utility;
diff --git a/companion/src/storage/firmwareinterface.cpp b/companion/src/storage/firmwareinterface.cpp
index 8a458d05212..fbda1df24cc 100644
--- a/companion/src/storage/firmwareinterface.cpp
+++ b/companion/src/storage/firmwareinterface.cpp
@@ -213,7 +213,7 @@ QString FirmwareInterface::seekString(const QString & string)
 {
   QString result = "";
 
-  int start = flash.indexOf(string);
+  int start = flash.indexOf(string.toUtf8());
   if (start > 0) {
     start += string.length();
     int end = -1;
diff --git a/companion/src/storage/labeled.cpp b/companion/src/storage/labeled.cpp
index c565966fd94..2c28758f96f 100644
--- a/companion/src/storage/labeled.cpp
+++ b/companion/src/storage/labeled.cpp
@@ -92,7 +92,7 @@ bool LabelsStorageFormat::loadBin(RadioData & radioData)
      }
 
     // determine if we have a model number
-    QStringList parts = line.split(QRegExp("\\s+"), QString::SkipEmptyParts);
+    QStringList parts = line.split(QRegExp("\\s+"), Qt::SkipEmptyParts);
     if (parts.size() == 2) {
       // parse model number
       int modelNumber = parts[0].toInt();
diff --git a/companion/src/updates/updatecompanion.cpp b/companion/src/updates/updatecompanion.cpp
index ba85770d7ff..712c7486a90 100644
--- a/companion/src/updates/updatecompanion.cpp
+++ b/companion/src/updates/updatecompanion.cpp
@@ -142,7 +142,7 @@ bool UpdateCompanion::asyncInstall()
   }
 
   if (QMessageBox::question(status()->progress(), CPN_STR_APP_NAME, "Restart Companion?", QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes) {
-    QProcess::startDetached(fileName);
+    QProcess::startDetached(fileName, QStringList());
     qApp->exit();
   }
 
diff --git a/companion/src/updates/updatenetwork.cpp b/companion/src/updates/updatenetwork.cpp
index 664105b77c8..b59bfd380b5 100644
--- a/companion/src/updates/updatenetwork.cpp
+++ b/companion/src/updates/updatenetwork.cpp
@@ -154,7 +154,7 @@ void UpdateNetwork::download(const DownloadDataType type, const QString & urlStr
 
   m_reply = m_manager.get(m_request);
 
-  connect(m_reply, QOverload<QNetworkReply::NetworkError>::of(&QNetworkReply::error), [=] (QNetworkReply::NetworkError code) {
+  connect(m_reply, QOverload<QNetworkReply::NetworkError>::of(&QNetworkReply::errorOccurred), [=] (QNetworkReply::NetworkError code) {
     //  leave it to the finished slot to deal with error condition
     m_status->criticalMsg(tr("Network error has occurred. Error code: %1").arg(code));
   });
diff --git a/companion/targets/windows/companion.nsi.in b/companion/targets/windows/companion.nsi.in
index 3e91eecbdd8..496928e1c28 100644
--- a/companion/targets/windows/companion.nsi.in
+++ b/companion/targets/windows/companion.nsi.in
@@ -128,7 +128,7 @@ Section "EdgeTX Companion @VERSION_FAMILY@" SecDummy
   WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\EdgeTX Companion @VERSION_FAMILY@" "UninstallString" "$\"$INSTDIR\Uninstall.exe$\""
   WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\EdgeTX Companion @VERSION_FAMILY@" "DisplayIcon" "$\"$INSTDIR\companion.exe$\""
   WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\EdgeTX Companion @VERSION_FAMILY@" "Publisher" "EdgeTX"
-  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\EdgeTX Companion @VERSION_FAMILY@" "URLInfoAbout" "https://www.open-tx.org"
+  WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\EdgeTX Companion @VERSION_FAMILY@" "URLInfoAbout" "https://www.edgetx.org"
   WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\EdgeTX Companion @VERSION_FAMILY@" "QuietUninstallString" "$\"$INSTDIR\Uninstall.exe$\" /S"
 
   !insertmacro MUI_STARTMENU_WRITE_BEGIN Application
@@ -195,8 +195,10 @@ Section "un.EdgeTX Companion @VERSION_FAMILY@"
   Delete "$INSTDIR\libusb0.dll"
   Delete "$INSTDIR\libusb-1.0.dll"
   ; OpenSSL libs
-  Delete "$INSTDIR\libeay32.dll"
-  Delete "$INSTDIR\ssleay32.dll"
+  Delete "$INSTDIR\libssl-1_1.dll"
+  Delete "$INSTDIR\libssl-1_1-x64.dll"
+  Delete "$INSTDIR\libcrypto-1_1.dll"
+  Delete "$INSTDIR\libcrypto-1_1-x64.dll"
   ; MinGW libs
   Delete "$INSTDIR\libgcc_s_dw2-1.dll"
   Delete "$INSTDIR\libgcc_s_seh-1.dll"
diff --git a/companion/targets/windows/dfu-util.exe b/companion/targets/windows/dfu-util.exe
deleted file mode 100644
index f2cbf8f34a2..00000000000
Binary files a/companion/targets/windows/dfu-util.exe and /dev/null differ
diff --git a/companion/targets/windows/libcrypto-1_1-x64.dll b/companion/targets/windows/libcrypto-1_1-x64.dll
new file mode 100755
index 00000000000..f996a04c8dd
Binary files /dev/null and b/companion/targets/windows/libcrypto-1_1-x64.dll differ
diff --git a/companion/targets/windows/libcrypto-1_1.dll b/companion/targets/windows/libcrypto-1_1.dll
new file mode 100755
index 00000000000..c4169f93541
Binary files /dev/null and b/companion/targets/windows/libcrypto-1_1.dll differ
diff --git a/companion/targets/windows/libssl-1_1-x64.dll b/companion/targets/windows/libssl-1_1-x64.dll
new file mode 100755
index 00000000000..f6cf40b9c25
Binary files /dev/null and b/companion/targets/windows/libssl-1_1-x64.dll differ
diff --git a/companion/targets/windows/libssl-1_1.dll b/companion/targets/windows/libssl-1_1.dll
new file mode 100755
index 00000000000..3633fcbf17d
Binary files /dev/null and b/companion/targets/windows/libssl-1_1.dll differ
diff --git a/companion/targets/windows/libusb-1.0.dll b/companion/targets/windows/libusb-1.0.dll
deleted file mode 100644
index 997df3200a1..00000000000
Binary files a/companion/targets/windows/libusb-1.0.dll and /dev/null differ
diff --git a/companion/targets/windows/libusb0.dll b/companion/targets/windows/libusb0.dll
deleted file mode 100644
index 9387bedad1d..00000000000
Binary files a/companion/targets/windows/libusb0.dll and /dev/null differ
diff --git a/tools/build-companion.sh b/tools/build-companion.sh
index a51e47a2855..128fba24c5c 100755
--- a/tools/build-companion.sh
+++ b/tools/build-companion.sh
@@ -32,7 +32,7 @@ OUTDIR=$2
 
 COMMON_OPTIONS="-DGVARS=YES -DHELI=YES -DLUA=YES -Wno-dev -DCMAKE_BUILD_TYPE=Release"
 if [ "$(uname)" = "Darwin" ]; then
-    COMMON_OPTIONS="${COMMON_OPTIONS} -DCMAKE_OSX_DEPLOYMENT_TARGET='10.9'"
+    COMMON_OPTIONS="${COMMON_OPTIONS} -DCMAKE_OSX_DEPLOYMENT_TARGET='10.15'"
 elif [ "$(uname)" != "Linux" ]; then # Assume Windows and MSYS2
     if [ "${MSYSTEM,,}" == "mingw32" ]; then # MSYS 32bit detected
         COMMON_OPTIONS="${COMMON_OPTIONS} -DSDL2_LIBRARY_PATH=/mingw32/bin/"