I upgraded to iTunes 11 a few days ago accidentally. The new version found my library, but all my playlists are gone. I always keep a backup of my playlists just in case, but I cannot figure out where to place my backups for iTunes 11. There is no clear cut "Playlists" folder much less any playlist file creation going on when I make a custom playlist in iTunes populated with songs. I've been going back and forth through Google to no avail. I have zero back data about any of the songs, meaning I have no play or import history, I have no rating history and have no playlists. I had over 20 playlists... This is very frustrating to say the least and I have no way to downgrade to my previous version.