I use PP2014 running on Windows 7 and have the main poser window on the left.  On the right screen I have the library pallet along with a few other pallets such as parameters, editing tools, light controls, light dots, render dots, pose dots and Camera plus.  All of them are composed so that the library has about 75% of the screen with the rest sized to give me the best use/size balance.  Set up as pereferences they all reload to the right hand screen without a problem.  I have not tried it with the right screen as the main so Windows may have the problem you suggest but, because of the nature of my room set up, the right handed main would prove difficult for me with the present room layout.

 

 

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.