FergVersion.EXE is a program that can run by itself to update Ferguson Fire apps without Admin passwords. The FergVersion.EXE can be run directly (i.e. double clicking on it from Windows Explorer, no installation required). When doing so, you'll see that you can select any of the Ferguson Fire apps to update.

To change the folder of the program you wish to update, click on the file name and select a different folder.

The program is included in the setup of all the Ferguson Fire apps to do updates automatically (when options are set to do so) after a confirmation when a new version is detected. Any installed application folder that has a copy of FergVersion.exe can be used independently to update any of the other applications.