did you download the source code or did you download the installed?
go download the installer,
double click it, it will install the game
World War II v5 Second Edition Alternative Setup (TripleA)
The alternative setup discussed in this thread
has been added to TripleA as a playable map. So no more edits required.
As the development process is still ongoing there is no version control at the moment.
So you will not be prompted to update the map called World War II v5 Second Edition.
To download the latest release including the new Setup simply remove your installed v5-map from within the “Download maps” dialogue, close the “Download maps” dialogue, reopen it and redownload the map.
This way you will always get the latest map-version (regardless whether you have been prompted about an update or not).
When downloaded choose the alternative setup as shown in the attached screenshot.