Rescan not working

[Wolfgang]

I'm running MinimServer installed by the Synology package that is delivered via Synology on a DS713+.
My version is 0.8.2 Update 42.
When I trigger rescan after I reworked my tags, I still find the same old tags in the MinimSrever tree after the rescan. Obviously the rescan is not rescanning the changed files.
Is there a way to make sure all the files get rescanned? Can I swipe a certain file to make this happen? (The only folder I can see under the MinimServer folder is appData)

greetings!
Wolfgang