I moved my iTunes folder to an external drive with assistance from the Apple Genius bar, however, my playlist content was deleted. I still see all the playlists on my MacBook, but the lists are empty. Is there any way that I might recover them? I've read some of the articles on-line and they don't seem to address the issue of missing items in playlists after the iTunes folder is moved.
MacBook, Mac OS X (10.7.5), iTunes v11.0.2