draftshift stop working

hi!

i have installed draftsight 2015 on two different pc (with windows 10 both). since a week ago the program stops working on all the two devices simultaneously, i tried to uninstall and reinstall but nothing changes(never happened before). i'm not a expert pc user so i sincerely don't know what to do.

here's a image of what happens every time i try to open draftsight on one pc as the other one 

 

 

 

 

 

 

 

 

 

 

i hope you can help me somehow, meanwhile i thank you for your support

luciano