Use alternative split char

widget/remote_panel.vala

@@ -288,7 +288,7 @@ namespace Widgets {
                 // Use ',' as array-element-separator instead of ';'.
                 config_file.set_list_separator (',');
 
-                string gname = "%s@%s@%i".printf(user, server_address, port);
+                string gname = "%s:%s:%i".printf(user, server_address, port);
                 config_file.set_string(gname, "Name", name);
                 config_file.set_string(gname, "GroupName", group_name);
                 config_file.set_string(gname, "Command", command);

widget/remote_server_dialog.vala

@@ -122,7 +122,11 @@ namespace Widgets {
 
                 string[]? server_infos = null;
                 if (server_info != null) {
-                    server_infos = server_info.split("@");
+                    server_infos = server_info.split(":");
+                    if (server_infos.length == 1) {
+                        // old file format
+                        server_infos = server_info.split("@");
+                    }
                 }
 
                 box = new Gtk.Box(Gtk.Orientation.VERTICAL, 0);

widget/terminal.vala

@@ -1486,7 +1486,11 @@ namespace Widgets {
                     ssh_script_content = ssh_script_content.concat("%s\n".printf(line));
                 }
 
-                string[] server_infos = server_info.split("@");
+                string[] server_infos = server_info.split(":");
+                if (server_infos.length == 1) {
+                    // old file format
+                    server_infos = server_info.split("@");
+                }
 
                 string password = "";
                 if (server_info.length > 2) {