The newest version is set to install in a different folder than the earlier version, "C:\Program Files\Sams Hill".
The earlier version was set to install in "C:\Program Files\Sam's Hill" with an apostrophe in "Sam's Hill".
Since it's being installed in a different location the earlier version does not need to be uninstalled before installing the new version, both versions can be installed without interfering with one another.
The desktop and start menu icons are the same for both versions, the earlier version is labeled "Sam's Hill" and the newer version is labeled "Sam's Hill by Sam Elmore". That's the distinguishing difference of the two.
If you don't want both versions installed simply use the uninstall feature from the earlier version to uninstall it.
The newer version is downloaded in an .EXE file instead of zip file, no unzip utility is needed to install it.
When prompted select "Save" to save the "Sams_Hill.exe" file to a location on your hard drive.
To install Sam's Hill run the "Sams_Hill.exe" file saved on your hard drive and follow the install instructions.