[ribtin]

Well that is a lot, and I can't think of an easier way to do it, unless you know SQL and can just run an insert, so the edit NFO File then Refresh it back into the library seems to be the only way.

As you don't have a UniqueID attached to the movie, it is possible to get issues with Kodi doing unexpected things, and you have just discovered one using this Add-on.

It is a much bigger problem with TV Shows where everything without an ID is given the default -1 database value, which means all your TV Shows and episodes with that value will be mixed into one TV Show.

 Ah, I see. A large bunch of my unlisted files are tv-shows though, and they are not mixed together like you say. So that part seems to work perfectly at least.