[fritsch]

Database version is bumped - rescan your content. If you use mysql, make sure that your server supports creating a new DB. Besides that - not a single idea without your logfiles ...

That's definitely the reason why, no need for logfiles here. I could always just rescan my content, but I'd rather not cause it's not just a loss of scanned content, I changed all of the artwork and some sorting for my movies/tv as well, and I lose all of that too.

Isn't there a version I can update to that won't lose the database, and then another, and then another until I get to the latest build. Or am I mistaking about that?

Normally the Database should be migrated. In your case something went wrong with that...

And no one can tell without the Debug Log ... so stop caring ...