Movies wont erase from ATV after I have erased them from my PC?

Actually, the movies are no longer there but the thumbs along the top are still there (the ones you can scroll through).

I want to delete these as well; how can I get rid of them?

Media > Settings > Clear Recently Watched


Excellent. Thank you!

However, now I have no thumbs at all…

Id liek to keep the ones that correspond to those that are still in my library.