Quote - DAZ is moving away from .dsf files to the newer .duf format.  This is to facilitate the importation of current content into Poser via DSON.

DSON is the native file format of DAZ studio. The duf files is the "user facing files" to access the lower level dsf files. The error messages basically mean that the files were installed incorrectly as the system can't find the base figures to load.

Unless you know how the internal workings of the format system works, it's suggested that you use the install manager to install the files as it's s shift away from how poser zipped files work. Manually copying and moving files when you don't know the set up will generally cause more problems, than setting up a directory for the genesis files, defining the location in the install manager then linking that in Poser.