I'm very confused. I can't get this to do anything at all.. I can't get the context menus to work, ...-zaaphod
If you're only using Windows Explorer, you only need the
SetFolDate.exe executable from the archive.
Copy it to a folder somewhere, (eg. D:\SetFolDate\SetFolDate.exe), and run it using
Run as Administrator, (required to add the context menu to the system).

When the window opens select
Install.
Install (No GUI) adds an extra context menu item that runs it using the last used options so no GUI opens. The window will close after the installation.

Right-click on a folder and the new menu item(s) should appear.

Selecting it will open the GUI.

The SetFolDateFM version is really only for alternative file managers, (in my case Directory Opus because that's all I normally use), and uses command line args for the parameters, whereas the Windows Explorer version grabs the selected folders from the explorer window.