Problem with OS4?

Just bought this and it seemed to have lots of potential. I prefer the 1-tap moving of Backgammon NJ, but Guru Pro had its own advantages. Then, as soon I changed to OS 4.0 on my 3GS, the program crashed within one or two moves every time. Perhaps they will fix this and I can evaluate this app more realistically if it works again.

GMS22 about Backgammon Guru Pro