DraftSight 2020 crashes randomly

I have the DraftSight 2020 (now with SP4, earlier with SP2 and SP0).
When i try to edit and save any drawing, the program crashes, and doesn't save the changes. It occurs randomly, somethimes the changes will be saved, other time won't.

I already tried clean uninstallation and reinstallation - as i found such solutions on the web.
It is neither issue with the drivers, because they are up-to-date.

I really would appreciate help.