I was running the latest patch of BG3 on GoG before version 1.7 came out. Now that 1.7 is out, it wants me to download 124.68 GB - pretty sure that's the size of the whole game.
At
https://baldursgate3.game/news/patch-7-now-live_121, it says that the patch is 11.6 GB on PC - much smaller than the 124.68 GB that I apparently have to download.
Is GoG not capable of patching the already installed game? What are other peoples' experience with updating on GoG? Anything I can do to avoid as 124.68 GB download every time a patch comes out?