Well, the person who made the player is active in KWWHunction. He's username is MasterDKR - http://www.besthostingforums.com/member.php?u=1337

I PM'd him 4 days back, till now no answer. So i guess i was scammed.
This player is on sale in here: (link removed) for 5 bucks. All what they did was, he and his partner added downloaded buttons to every streamed song. It's very likely they used pirated version.
Anyway, im gonna buy regular licence today, i hope it works this time.