Yeah, I’ve changed the tooltip a bit.
As the original said, “100cm is X original units”, so to make your map larger, you decrease your scale factor.
If the original Source unit is an inch, that would mean about 39.37
Downloading it now.
As long as they didn’t do a big change like the one from VS2013 to 2015 between 4.9 and 4.10, it should in theory work, but we’ll see.