Quote - I must be doing something wrong. The SR installed without issue. No settings were changed. My defaults remained as they were. No runtimes disappeared.

Did you tick the "keep settings" option?

I didn't.  I flew through the screens so fast I didn't read carefully. 

If you do choose the keeps settings option, it does keep all your settings and libraries.  (I know, because I also updated a copy of Poser 9.  I went slower with that one, changed the default option to keep settings, and it did keep all my settings and runtimes.)

I still think the default should be keep settings, rather than revert to factory, but I should probably read more carefully before clicking "next."  One of these days I'm going to end up being Bill Gates towelboy because I clicked "I agree" without reading it first.  ;-)