Has anyone tried "PolyCAD"?

[Keycube]

Hi folks;

I just downloaded PolyCAD, a free bit of software with advertised marine applications, and I was wondering if anyone has tried it, and has some tips for getting started. I would like to fiddle with it, as I have extensive AutoCAD experience (if that helps at all). The "help" file that came with the dowload really wasn't of much help at all.

Thanks.

Robert