Before I moved my library from iTunes to a Synology + Plex setup I created 5 smart playlist (with rating 1-5 stars inside iTunes) which I exported and imported successfully through Soundiiz into Plex. Using the iTunes XML learning options did not work at all for me.
But now I struggle how I can I select all songs inside a playlist and assign with a group/bulk edit the rating back. How could this be done?
