My mouse is from steelseries, but the engine is (according to the manual, I just checked) optional. It is just for easily making Makros etc. but I can try to download it anyway, if you think that could fix it. My Tyalo keyboard on the other hand absolutely doesn't use any software. It is all just simply USB plugin. As I said: I had the exact same issue with a previous version of the game, also with TAB for leaving a scene. Last time it simply disappeared with the next update.