SU Freezing

Have been using SU for about two years for work. Current version is SU Pro v19.2. I am on a Mac Notebook using Mojave v. 10.14.6. Never had any freezing problems before but it’s now preventing me from performing at work. Can someone walk me through a fix? I ran disk aid with no reported issues. Not sure how to proceed.
TIA
John

What steps do you take before it then freezes?

Just ordinary and normal SU manipulation. In this most recent case I wall using the dimension tool. File size is only 14MB