DrawPlus X6: Keeps wanting to save as .dpx file

Hi all,

I've looked through the forums for an answer so forgive me if I missed it, however, I'm running DPx6 13.0.2.24 (64-bit) and every time I create a new drawing and go to save it, it defaults to a .dpx file. Sadly, I didn't catch this until recently and now when I go back to find some of my work, I thought it was missing because I was searching for .dpp files.

Any suggestions on what might be causing this and how to correct it?

Thanks,
Ken