As I look through the Forum, I see a lot of folks having problems with DraftSight shutting down and not loading properly......etc. It looks like the DraftSight folks would want the program to work properly. It is a great program, but needs fixing. I am using 2018 professional. I am having a problem with the program locking up when I move something fast when I am drawing. Is there a service pack for 2018? Hopefully, they are listening.