I just imported DB from 4.8 to 5.4.8.0 no covers are showing anymore, .. thay all are still in C:\Program Files (x86)\eXtreme Movie Manager\Covers folder.
Hello! You must manually move the covers from C:\Program Files (x86)\eXtreme Movie Manager\Covers folder to Covers subfolder in folder where is your XMM 5.x DB. Bye