Draftsight not even loading up!

I have been running a previous version of draftsight on windows 7 professional 64bit for a good year or so now (don't know the version number I'm afraid) and it stopped working suddenly one morning - wouldn't open any of my files that I've been opening for ages. I looked on the website and saw there was a new version (V1R5) so have downloaded and installed that. However now when I try and open draftsight I get the banner that you normally see at the opening of draftsight then the following message "Draftsight has stopped working. Windows is checking for a solution to the problem" followed by a message "Draftsight has stopped working. A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available". Then nothing!

I sent the following to DraftSight support centre and got re-directed here:

The main problem we are having is that when starting the program it gives us not responding

We have installed version 64 as recommended as our system is 64

Installed available updates

Ran disk cleanup and checked for errors

We have run it as administrator

Tried repairing it

Removed it completely then reinstalled it

Tried it on safe mode

Our system is windows 7 pro 64 bit

 

I'm running it on a stand-alone license

Anyone able to help? I'm stuck!

Thanks, Adam