No.
It is intended to retain which movies were watched and which tv show episodes.
Regarding the ‘Added at’ date, I might have an idea:
After deleting the library, perform steps 3 and 4 of the
Plex Dance
This is supposed to remove any metadata about your music from the database.
Caution: this may take a while.
It is recommended, to optimize the Plex database afterwards.
