Crashing

Help 

 

Every time I try to add a dimension to my drawings I get a notice that Draftsight needs to close and do I want to save my changes. if I hit yes the program shuts down and does not restart.

 

I have been using Draftsight for a few weeks with no problems until today and its a nightmare. any ides on how to correct the problem ? its driving me crazy 

 

Steve Forest