Thanks a lot for the crash dump, we are examining it.
Would very much apprechiate to learn more about that. Ideally, if you could send the performerProjectXXX.xml of the Performer folder with the Cubase project name, just the xml file, and the name and bytesize of the audio file in question.
Your video issue is very strange, haven’t had that with version 5. pls check to see if it has anything to do with hiDpi settings: a) Cubase preferences enable/disable hiDpi, b) Windows scaling - try 100, 150, and 200, does it make a difference? Also your graphics card model would be interesting. Sorry for the inconvenience.