#1 Patch 1.0.130+ to 1.0.169
#2 Patch 1.0.169+ to 1.0.177

both are described as such in your Account \ Divinity OS

It says 1.0.169+ to 1.0.177 - which means it can be applied to any version 1.0.169 or higher. There are three patches available to download:

#1 universal update, for versions 1.0.74 or later that updates the game to 1.0.130
#2 patch for 1.0.130 or later that updates the game to 1.0.169 and adds free DLC
#3 latest patch for 1.0.169 or later that updates the game to 1.0.177 and adds Polish localization

installer 2.7.0.14 corresponds to dev version .107 -> which means that you need all three. Still, it's DL size under 2 GB, as compared to 9GB of a new build.

We do not keep all the patches on the shelf, only the recent ones. That's nothing new, it is the same with other GOG games. If it's really a crucial issue, you can write to our Support and they will provide you with an FTP link to that particular file.

Installer includes DLC, yes. But you may also want to install yesterday update (.169+ with Polish localization) as it contains several fixes to all language strings and can be installed over the latest build. Unfortunately Larian decided against increasing version number, so it's still labeled as .177 and may cause some confusion.