Thanks!
I downloaded edrawings and opened my AutoCAD file in it. Now I'd like to "save as" EPRT and I'm seeing only the choice for EDRW.
So I save as EDRW and then rename file extension to EPRT (because it seems like these are ambiguous file extensions that would all be recognized by edrawings) and I can open it just fine in edrawings.
Is this the appropriate method, or am I missing something?
Anyway, let me know!