Problem downloading Draft Sight Free version

I was having a few problems with draft sight free 2D version so I unistalled it and tried to re-install.

I have tried this many times over the past few days but it has never asked me to activate it.

When I open draft sight then try to open a previous drawing I get the message "This programme must close"

If I a make a new drawing in draft sight and try to save it I get the same message.

 

Can any one help me.

 

Regards

Roger