impaired model view screen display

I am very excited about the prospect of your Drafts Sight program. I am experiencing a problem however.

I just downloaded draftsight.  After install, which I did twice after complete removal of program each time, and a re-download of program and reinstall due to thinking it was corrupted in its download or install process, the program’s window has approx. ¼ of it showing whatever’s in the background of the DS program window especially in the corners but sometimes across the entire model windows bottom.  If I move the cursor the issue resolves itself momentarily but then goes back to the impaired screen view as soon as the cursor stops moving.  I have attached a screen shot of the issue.

Any suggestions???