[AnonTester]

@Alexander78 While very frustrating if your movies are actually gone, it is extremely unlikely that this addon did this. Not only does it ask for confirmation to delete by default and checks for the amount of files/folders and asks for confirmation again if it would delete more than 10 files, but it's also not designed to do this at all. It runs after a movie or episode was played and not on its own.

It is a lot more likely that one of the following things happened:
- your movies are on a remote disk or network share and the disk or share is not mounted (kodi just doesn't see them)
- OS update interferes with mounting remote disk or network share (kodi just doesn't see them)
- new user or profile created in kodi with empty database
- the remote disk died (movies actually gone)
- the kodi database got corrupted so the movies are still there but kodi doesn't know about them any longer
- kodi database in mysql and mysql not started or accessible for some reason
- accidental deletion of files by someone or something with access to the source (files actually gone if there's no backup or recycle bin or similar)
- other

See this post how to find your logs/debug logs and provide meaningful information for anyone to be able to help you.
https://forum.kodi.tv/showthread.php?tid=233369