APIv9 supports offline songs and loots of new goodies, but I currently don't have time to implement all that. The library should work, though if some of the methods crash it might be because spotify has changed their API. Google libspotify to find it's documentation.
…o Search and ArtisBrowse
…listTrack, so PlaylistTracks are removed in PlaylistTrack.Delete instead of Track.Delete (which gave errors).