I purchased this, downloaded the iso, burned a cd, installed with the "save old settings" option, and the install was hosed. RPHost.exe and/or RPHost.ini were among the problematic files. I sort of fixed it by copying some files from the CD into the C:\Program Files\Cloanto\Amiga Forever\... and into C:\Program Files\Common Files\Cloanto\RetroPlatform\... folders, but who knows if it actually fixed the problem or made things worse. RP does run now, and AF runs, etc. Cloanto wants me to try reinstalling and sending them some sort of logfile, which I will try tonight.
Here's a question I could probably answer pretty quickly if the machine were in front of me: How can I run WB 3.x directly, without opening the RP interface? I'm rarely interested in the other stuff, and just want to get to my Workbench.