Just wanted to report this one. While working on a project, I was waiting for the Preview window to finish rendering. Then, I didn't want to continue waiting and clicked on the rendering tab; and, the program crashed.
I reopened TG3 and selected 'recent' file; and, the file was no longer there! Then went into my system and found the file was still there. I clicked on it and the project opened up thank goodness. Never had anything like this happen before in either TG2 or TG3.