Hello, After restarting my Macbook I've found, with devastation, that only a fraction of a very large iTunes library has been restored. While I still have the media, the playlists are gone and the artwork which I painstakingly uploaded over the years appears not to return when I reupload the songs. The notes added to many songs and podcasts are, I fear, gone as well. I found a previous itl which I renamed, dropped in the iTunes folder and attempted to import but only get the message: "The file 'Itunes Library.itl' cannot be imported because it does not appear to be a valid exported file'." In many years of using iTunes, this has never happened before and I'm incredibly depressed. Any help would be warmly appreciated.