The BPN is a the backup file of the PLN so you might not need to open those.
You can get a student license free at myarchicad.com (30 days demo and then a full year). With this you should be able to open the file.
Saving to DWG is as easy as using the "Save As" command. Look in the Navigator for the "View" of what you need and save it to DWG.
Eduardo Rolón AIA NCARB
AC27 US/INT -> AC08Macbook Pro M1 Max 64GB ram, OS X 10.XX latest
another Moderator