Problem with Draftsight free 2D

Drafsight free 2D was working perfectly then I started having problems so I uninstalled it and then re-installed and have done so several times and always have the problems listed below:

When I try to open a previous file I get the message “The program must close” etc.

When I create a new drawing and try to “Save As” I get the same message. Then the message “DraftSight is not responding”.

 

Can you help please