After getting an error message each time I tried to apply the patch via the "Search online for updates" function, I downloaded it from the link on the first page (last one, as I have the English version). However, the same error message appears when trying to run the .exe file:
Couldn't identify the installed version of Divinity II - Ego Draconis. Debug "02c95b6e64caa93a6c0a432b7fd03628"
I got my digital copy from gamesplanet, and my current version is 1.0.13.67. I'd appreciate it if you could tell me how to solve this issue, or if it is to be expected - as I understand there are millions (:p) of different versions, so maybe the update for mine isn't available yet.