How to export/backup (one/all) (Auto)-Playlist definitions (only)?

[clsven]

I setup up to 10 playlists until now including a rather complicated auto-playlist.

is there a way to export these (at least one by one9 playlist definitions into a text file?

In which file are these Playlist definitions (not the song titles which they contain) stored?

[Zak]

If you want to back them up, say, they should be in the folder specified in:

Edit > Edit Preferences > Library

in the Library Playlists field.