Carbide create build 743 crashed

Hi Folks, has anyone had their carbide create crash in the middle of designing something? I spent 3 hours setting up a program to cut multiple pieces and as I was setting up the tool paths the program suddenly shut down and I lost all the work I had done. I am using build 743. I know I should have been saving it along the way. My mistake, but this was the first time it had happened. So just to be clear my computer did not crash, just the Carbide Create program. Any input would be appreciated.

Dan