In the process of making some adjustments in options, I selected "Use hardware acceleration when available", on next attempted relaunch I got a message basically saying 'something has caused the program to stop' (had to paraphrase because I didn't make a note of the message). I had to reinstall to get it to open. My questions are "what causes this to happen?", and "is there a known solution, other than having to reinstall?".
Thank You, Imho