No specific timing but it will crash eventually and leave me with a busted project that won't restart. I get this error every time, see enclosed image. It says the project is not there, how can it not be there if it crashed and if it is possible what do I open and make a change. The art and sound and all the working files are there. I have been fighting this problem since I moved to 64 bit win 7, not one thing is different as far as hardware, it is the same computer just a different hard drive running win 7 64 bit.