Afterwards I went through following steps:
-> DB-Tools -> health check -> Program reported new filesizes acknowledged.
In list view all new file sizes are fine In Tile view the labels still show the old size When I briefly play the video from within Videonizer, the labels are updated The "F3" or update button on the edit-Window changes nothing, "Pickup known Tags, Artist and Sites" is set to ON.
Workaround: add the "last updated date label" to Your multimedia settings. By this all labels are update automatically. You can remove it afterwards
Hope this helps