Drafsight Free stopt working after update to 2017 SP2

Dear DS,
Ever since i updated my free copy of Draftsight to the 2017 SP2 version, Draftsight does not launch anymore. After activating it launches but only to close immediately. Please can you help me out. I run Windows 7 64 on both my laptop and my PC. I have un- end reinstalled it, i have the latest updates for both Windows 7 and my Graphics Card.
Regards, Jack van Staalduinen.