Fixed a bug that caused the OpenSeeLauncher to only work when `useP…

…invoke` was true.

Unity/OpenSeeLauncher.cs

@@ -284,7 +284,7 @@ public bool StartTracker() {
             processStartInfo.RedirectStandardError = true;
             processStartInfo.UseShellExecute = false;
             processStartInfo.FileName = exePath;
-            processStartInfo.Arguments = "facetracker " + argumentString;
+            processStartInfo.Arguments = argumentString;
 
             trackerSB = new StringBuilder();
             trackerProcess = new Process();