So I had gone through and tried the various fixes presented in this thread, which resulted in little success. Was hoping to revive the thread and see if anyone had additional information. With my situation, it seems random. Last time it happened, I had just kill Vellum and tried to exit when it crashed. I don't know if it helps at all, I'm using Windows 10 and drivers (as far as I can tell) are up to date. Any suggestions?