Patch v1.1.1.0 and new installer are now available.
There was no update flag.

Changelog:

Patch 1.1.1.0 (01st July 2016)

Restored baked AO, which is now mixed with SSAO for extra graphical fidelity.
Fixed a bug which disabled post processing in the Factory map in Survival Mode.
Fixed the Blizzard achievement.
Fixed a crash on exit.
Fixed a bug blocking the upgrade machine, when controls have been remapped.
Removed debug key bindings (e.g 0 which toggled interface and HUD rendering).
Added borderless fullscreen mode.
Localized quick save.
Cutscene skip message disappears after blinking a few times.
Fixed black screens when post processing is set to low.
Added key bindings for cycling between ranged weapons.

Why does it need to re-download the whole game?

There is a patch. I don't use Galaxy but in the downloads there is a separate download file for the patch.

Oh, now I get it. I'm quite new to GoG platform and I've been only using Galaxy. Thanks.

Not sure, but I'm guessingt that means the save file is saved somewhere locally.
But then, where were they putting it before?

haha, I dont' know.

It looks like they broke light refraction with this patch (rain effects, etc).
So, we'll be getting another patch, but who knows how long that will take.

How many times until they get it right.

Oh, I wonder if that was meant for Steam users and nothing changed for us.

You said the patch does this:
Removed debug key bindings (e.g 0 which toggled interface and HUD rendering).

Does that mean you could turn off the hud before, but not now?

That's a dissapointment. I want to remove the hud.