Why is my CorelDraw 2018 shutting down on its own?

There doesn't seem to be a pattern or a particular type of file I am working on, but I've been having this issue lately.  I will be working on a file, and just suddenly Coreldraw is gone! It just shuts down. Doesn't give an error message or anything.  When I start the program up again, it will say it found a backup file (or more than 1)  do I want to open it? and of course, unless I've recently saved it, I will have lost most of my work. I just don't know why it is shutting down. Any insight??