Uninstall RawTherapee 5.5 before installing 5.6?

I have RawTherapee 5.5 installed on my Win 10 Pro 64 bit system and am trying to install version 5.6. The setup program wants to install in a separate 5.6 folder, which to me means I might have two versions on my computer at once. I have checked Rawpedia and the install download page, plus searched for information about this and can find nothing. How do I install 5.6?

The simplest is to first uninstall the old version then install the new version.

I uninstalled it using Revo Uninstaller, but did not delete anything in the AppData folder. When I opened 5.6, everything I expected was in the Recent Folders and Folders lists. That’s what I was concerned about losing.