Windows 7 no longer supported. Installation fails to find server to validate key.
Since October 2018, Windows 7 is no longer supported either officially by Dovetail Games, nor by ChrisTrains.
There is no guarantee that any ChrisTrains product will work in Windows 7.
The most likely error you will encounter is that the installation program will not be able to contact the license server during installation.
The only solution at this time is to ensure you are running windows 8.1 or later.