After upgrading to Java version 8 ugrade 40 I too get the message 'Could not start the application' - 'Please reinsall the application'. I have tried uninstalling/reinstalling everything but no change. As mentioned before running the debug application gets it going, the path on my machine is:- "C:\Program Files (x86)\Yawcam\debug_start.bat". Motion detection works as before with images saved to file. Can't comment on streaming as I don't use it. Hope this helps.
