I installed the trial version of Voila and used it for a couple of days, but I was suddenly unable to quit the program, either through the File menu or by force quitting. When I click on the app, the "Purchase License" window comes up in front of the program. I'm unable to click on anything on that menu, including the "Register" or "Buy Now" buttons. I'm unable to restart my computer because the app won't close, and I'm unable to delete and uninstall the program because my computer says it's open. I can move around in the program a little, but nothing will play, and I can't minimize or "X" it out. How do I quit the program?