I have the library woking as well, launced from the scripts menus not the addon under 'window' which I believe is used for updates.  Confirm that this does launch as manager 2.6 or 2.6.130312 to be exact.

wimvbd has stated that the shaderworks update is to add extra funcionality of Poser 10.

 

 

I use Poser 13 on Windows 11 - For Scene set up I use a Geekcom A5 -  Ryzen 9 5900HX, with 64 gig ram and 3 TB  storage, mini PC with final rendering done on normal sized desktop using an AMD Ryzen Threadipper 1950X CPU, Corsair Hydro H100i CPU cooler, 3XS EVGA GTX 1080i SC with 11g Ram, 4 X 16gig Corsair DDR4 Ram and a Corsair RM 100 PSU .   The desktop is in a remote location with rendering done via Queue Manager which gives me a clearer desktop and quieter computer room.