Only the changelog, er, changed
for that game, there were no apparent file updates. If it were a new game I'd think it's a Galaxy-only update for the time being, but since it's Crusader Kings
179044512 Nov 6 2015
175913720 Nov 18 22:58
I just start follow this "update thread" recently, so I am not sure if my old installer update or not.
I used to update everything as soon as possible, but GOG notification is quite buggy (as everyone have known).