H:ZD keeps crashing

I’ve been playing for years, and haven’t had any problems, suddenly this week it keeps crashing. I’ve tried with both my gaming desktop and my laptop, both are behaving the same way. As soon as I reach a save point such as completing part of a quest or quick saving at a campfire, and I get a ‘game has crashed’ message and an option to send a crash report (which I do each time). The fact that the identical problem is occurring on two different machines has me baffled. Has anyone encountered this and found a fix?