Export to pdf and circles become polygons and other Mac problems

I'm running the latest version (V1R3) of Draftsight on my Mac (10.5.8) 

The reason I have the latest version is that every 30 days or so the software wont open.  The only fix I can figure out is to download and re-install the software and I'm good for another month or so.  I've never received a registration email or otherwise, so I'm a bit baffled.  It's as if I have a trial version but can't find a way to register it to become a 'full time' version.

The big problem I just encountered is exporting to pdf.  I'm using the same computer, same drawing file, and same export procedure that has worked dozens of times previously.  The only thing new is I downloaded and re-installed Draftsight today.

All the circles (that read as circles in the .dwg file) show up as polygons in the exported pdf file.  I did a test print of the pdf and it prints out the polygons too!  If I can't make .pdf files to send out for full size (48x36) prints then I'm dead in the water.

A fix for these issues would be immensely helpful.

Thank you,

-Alan