I'm using the desktop version of Spotify in Windows 7. I tend to A) Be offline quite a lot and B) format my PC quite a lot. Whenever I reinstall Spotify I face the arduous task of right-clicking on my playlists (of which there are hundreds) and then clicking the "Available offline" option. As far as I can tell there's no way to make all my playlists available offline with a single click, and there doesn't seem to be an option for it in Spotify's preferences. Please add this!