After upgrading when I click on the icons to run PC Property Manager I get this error message:

There is no data folder where PC Property Manager expects: C:\PROGRAM FILES\PC Property Manager\DATA

This error indicates that the original installation of PC Property Manager was to an alternate location.

To identify the correct location for the upgrade go to the icon you normally use to start PC Property Manager. Hold your mouse over the icon and the Location will be shown.

This is the location which should be selected when the installer gets to this screen:

Run the installer again, using the correct location.