It just freezes after using it for a while?

I am using; W10
After I have used it a while it just freezes. Doesn’t seem to be any particular activity causing it.
Then I have to kill it with taskmanager. It recovers, but is without most of my recent work.

I posted the same question a couple weeks ago. I was on a newer version and was told to go back to as it is more stable; but I have the same problems on is as the later version.

I can’t be the only person having this problem can I?

I like Libreoffice, but would love to go back to Office97 which had no problems, but I tossed the CD after I tried Libreoffice. Stupid, stupid, stupid.

I have the same problem with calc. Win10 x64 pro (latest) and Libre Office