Content Ok, But App is Buggy

Installed the app and started to view content. Video would become jittery when moving mouse over and displaying the transport controls. Also, while in full screen one of the lesson videos ended and the screen went to full white and I could not exit no matter what key I pressed. All it did was beep at me and finally the ESC key did eventually work but once I returned to a windowed version of the program all my icons on my desktop were gone. Uninstalled the program and rebooted. Now I seem to be back to normal. This is a little too buggy for me.

Terabyte2007 about Lessons for iMovie