Hi @Andy We have install BB 2.0 Version B#1066 and we can say that some bugs from before on Windows and MAC are fixed. What we have noticed on MAC is on Simulator Preview sometimes is slow down game and after 2-3 second it come back to normal, and again slower it and again back to normal. On Windows BB 2.0 Version B#1066 it crashes after every Simulator Preview. Is it matter which Windows you using? Currently we are on Windows 8. Do not know much about windows, we are more MAC lovers.