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Well, the topic says it all. I fail to find the option to download the installers.

Back in the day, I used the GoG Downloader. When that was merged into Galaxy, I used that. So, where is that functionaliy?
click on the game, then on "extras" at the top. the installers should be at the bottom of that page
if there's nothing in new galaxy you can use gogrepo script to download single game or to backup whole library
Yeah, found it. No idea why I failed to find that yesterday, it is pretty much in the same space as in the old GoG Galaxy...
Anyway, Gog Galaxy 2.0 is officially usable, as its main functionality for me is being a GoG Downloader.
I didn't know it was there neither, thanks.