Well, from my experience GOG is frequently behind with the Linux version - even several days
(having 400+ games I can even say that some weeks no update is presented for any platform
which is clearly related to lack of time as thereafter comes a significant larger number of updates).
Additionally, as Steam has a Linux version (it is not seldomly found that GOG has one and Steam lacks it),
it is quite clear that Linux version update will be there soon - these are awesome programmers, right? ;)
Saying this I have just written to the developers and will give any answers below when I get it.
And I am longing to get hands on the updated version ASAP, too.
JMB
*** The Update for Linux has landed on 23.09.2020 - so the typical delay by GOG - sigh.
*** One really gets the impression that things only change when people speak up ...
*** so there should be a lessons learnt by GOG in near future.
*** This general rule of putting out Linux Updates 2+ days after the other platforms is not acceptable!
Post edited September 23, 2020 by JMB9