Great App, But I Cannot Restore Purchases

Dont get me wrong, this game is really fun and reminds me of BM Tron from the computer. I recently upgraded to the 6+ from my 5 and I lost the ability to do two player on one device. When I go in to buy the key again, it says that I have already bought it and that it will be restored for free. When I hit "OK" the message disappears and nothing happens, and I dont get the key to play two player.

Kenny.va about LightBike 2, v2.3.14