There is a serious bug that hasnt been fixed for such a long time. Probably, the reason is that developer created new music player recently. Its called "Loud". I think there will be no update, so if you thinking of buying smart player - think twice and buy a "Loud" - its much better. Its disappointing that developer creating new paid product instead of working on old one. It shows no respect to those who has already bought smart player and dont want to pay again for a new player.
MarkWicked about SmartPlayer - Music Player and Scrobbler for Last.fm, v4.1.7