This v2.3 file adds new masks for the SaFL mapboard sized hexes (1.25x normal size). The file is a .vmdx file renamed with the .zip extension so that it can be posted. Just download, rename the extension from .zip to .vmdx, and place in your extensions folder. remove the old v2.2 extension. If you do not play on that board, there is nothing new and no reason to download this update.