DraftSight aborts IMMEDIATELY when started

HELP! I only use DraftSight occasionally when I need to get PDFs for DWGs of older projects.  Last time was in March 2017, and it aborted as soon as I tried to run it.  Went to website and found out I needed the SP1 upgrade which I installed, and everything was fine.  Today I ran DraftSight to do a PDF for somebody - told me I had to re-register, which I did - DraftSight then opened, and I did the PDF - then I closed it and when I tried to re-open it, it aborted immediately so it's broken again.  I've uninstalled, powered down and up, reinstalled SP1 several times now, tried to run the patch (which says I dont' need it as expected since I have SP1 installed) and same thing - double click, get the startup banner, then it just flashes and aborts immediately.  HOW CAN I GET THIS FIXED???  Thanks!  PS I'm on current version of Windows 10.