Hi Jim. Thanks for the help.
I had tried restoring older library backups with no avail, but I now restored an older one and the playlists are back. Maybe not 100% up to date but at least most of it is there.
Strange because I was playing those playlists this morning and backups from several days back seem to be empty of playlists.. Mind you, it's possible that MC29 had been running for several days.
Thanks!
Regards,