Nails60 posted at 9:13PM Tue, 24 September 2019 - #4363789

I found that if you are installing over 11.1 it doesn't force an un-install, but over 11.2 it does.

Interesting. I had 11.1, chose Use existing preferences and like @Rhia474, everything went smoothly. Just note that you'll find the updated version in Program Files/Smith Micro/ Poser 11.