Music module, but it also deletes all the contents WITHIN the .m3u playlist itself. In other words, next time you go load that playlist, nothing will appear since StreetDeck overwrote the playlist with a blank. Just wanted to let you know since I've cleared out my playlists several times during testing.
Could you possibly include a large version of the Album Art in the "Now Playing" module? Currently, the album art is literally "thumbnail" sized.