Can comfirm, having the same issue. Not sure what a checksum is but the four letter acronym next to the version number is UUBD, which is wrong right?
Tried a few things others have suggested such as validating cache and deleting the folder from My Documents to no avail.
Am holding off on playing any SoA until I can play ironman so here's hoping there's a solution!
EDIT - Should also have pointed out running on Windows, no mods whatsoever. Why do I have the wrong letters?
EDIT 2 - Solved! Man on reddit recommended deleting common folder, then validating. Worked for me! Ironman here I come!