And the newest version also works from the Scripts Menu.  I'm probably not the first person to report that none of the EZSkin 3 versions respond to the close window; one has to click on the close icon within the app itself instead.

I want to thank you for your help. It appears that as I get older, I confuse a bit more easily, and this one (especially the peculiar behavior of the Poser 11 version) was confusing to start with.