3.55 kneaw game stays mounted

Since yesterday I upgraded from 3.41 PS3Key to 3.55 Kneaw. Everything went fine. Installed the latest BM's (Gaia, Multiman an Rogero) and when I mount a game via a BM, I can start the game but when I stop the game and want to mount another game, the last game stays under */app_home/ps3_game/ and under the place where you normally see the blue disc. So I have to disconnect the power every time I want to start another game. Does anyone know if this is something simple ? Did I forget to do something ?