When I worked with Poser 7 and 9, I would open a file (figure) and click on the figure's body.  A + sign appeared somewhere, and I clicked on the + to add the figure to the library.  So easy!

That doesn't work for me in Poser 11, so I tried Poser 9 to get the figure in the library.
I clicked on the +sign and opened Add to Library.  That gave me New Set.  I clicked on it and see the figure icon in my library.   But I can't find it in Poser 11 when I open the library.
Totally confused!