Otis Pertwee

I used to do work in Primcomposer a few years ago, happily rendering and baking things from 3ds Max. Now, Maxport doesn't seem to work (Liferain.Maxport.Bridge crashes whenever it tries to upload the HPA). After hours of clicking around and googling like a madman, I still can't get a difinitive answer- is there ANYTHING that can upload and import these HPA files? I'm only finding viewers that use the older xml format and can't see any way to make primcomposer spit those out. Any help would be hugely appreciated, thank you.