JUST AN UPDATE HERE: If you are using the Bondware 11.2 version installer, that location is not where the manual appears. In fact, after installation of both the primary and the support file, I had not file named "documentation" in that location whatsoever. When I finally found the PDF file it was here:

C:/Program Files/Poser Software/Poser 11/Poser References Manual.pdf

Hope that helps others. I don't know if they moved it after the 2019 acquisition or what. But the 11.2 did not have a documentation file in that location.