Just to humor me, I opened my P11 and loaded a G3F figure created with Willdial's app and I did find that the file still associated itself with DSON. However, I saved back the figure into the P11 Library and allowed Poser to generate a new obj file when I was asked. I went back into P12 and loaded this newly saved G3F figure,

A fully functional Genesis 3 figure. I would need to play with Genesis 8 using this workflow and determine if the key process to all this is just resaving the figure to the Library with a new obj through an earlier Poser version and just loading the figure onto the stage in Poser 12