Hi Cheryl
Have you been using Cartoon Animator with a dual screen setup? A common problem occurs when panels have been moved onto second screens and then disappear when reverting back to a single screen.
If you think this might be the problem, try going to Window > Restore Default Workspace on the Menu Bar to see if that resolves the problem.
If it doesn't help, please try opening CTA4 on the dual screen again and make sure all panels are moved back to the first screen.
Do also try completely shutting down your computer and then restart. This can often solve problems when the computer hasn't been shut down for a long time.
Peter
Forum Administrator
www.reallusion.com