Restore very old iTunes Playlists?
I am trying to find some old iTunes playlists of mine from 2007. I have the original .itl backups from that time, but the new Music app does not recognize those files. (I have tried closing Music, then holding Option while I open it again and it prompts me to choose a new library, but it gives the error "does not appear to be a valid library.")
I am currently running Big Sur.
I still have all of the music, but I want the original playlist listings. I am happy to pore through code if I have to, but I don't know how to view the contents of the .itl file. It opens nonsense in TextEdit, for example.
iMac 27″, macOS 10.15