Is there a way to refresh the Movie Gallery database if I move items around?

In the case that your movie gallery is out of sync and needs a manual refresh simply follow these steps:
  1. Go into Services
  2. Stop "My Media Center Services CData Service" service
  3. Stop "Yet Another Media Meta Manager" service
  4. Go to C:/ProgramData/Yammm/Cache
  5. Delete all files
  6. Restart "My Media Center Services CData Service" service
  7. Restart "Yet Another Media Meta Manager" service