I hope there wasn't any updates... I just ripped mine out of my arcade guns and replaced them with GUN4IRs. This is the first I've heard of an alternate IR firmware to support 4 points. Is the camera even capable of registering 4 different IR points?
It was ok given the lack of anything else available, but the GUN4IRs are pretty much spot on all the time. I still have the Aimtracks but was debating tossing them out. I can't imagine ever using them again...