I've downloaded the newest version, both by opening AWB as administrator on Windows 7 and updating, and by opening AWBUpdater.exe by itself as administrator. Help > About version: 18.104.22.168, SVN 1187 (2016-02-11 12:39:55).
Fixed in SVN version of AWB updater in 12009
We'll upload a release to fix it, but unfortunately, due to the nature of the change, the updater won't be able to update itself, in the same way that the updater cannot update AWB either...
So you'll need to manually update to get the updated updater...
Sigh. Bloody sourceforge