Changelog for Patch 1.2.8 / (Windows, Linux and Mac) (added 12 July 2017):

- added 3 new languages to the game: Russian, Polish and Brazilian-Portuguese.

Fixes
- Audio - Added a reset sound button to the pause menu that will stop all sounds for a moment. Use this when sound gets stuck in a loop.
- UI - Fixed several missing hover sounds, incorrectly centered text and positioning of a few sprites.
- Crash - Game should no longer crash when incorrectly loading the weekly challenge. Check the Discussion here.
- Campaign - William now correctly shows up on level 6 to tell you that the new level length is 12 months.

New
- Loading times between screens are now shorter.
- Added a confirmation window when returning to main menu from the town.
- Land auction - The AI opponents now take less time to bid on land when playing on a slower computer.
- Localization - Updated several Russian translations.
- Localization - Reduced the scale of some texts that did not fit on specific translations.

So there's 2.0.9 on GOG while there's 3.0.39 on Steam for half a year now. I don't like to give (hasty) bad reviews and I'm usually not a user who always needs everything to be up to date.
But before I put out a bad review: Is there any perspective at all that we'll get to a reasonably up-to-date state of the game?

If this is addressed to me, I'm sorry to inform you that I'm affiliated neither to the dev/pub nor to GOG, just a customer like you. You have to address GOG or/and the dev/pub to get the answer to your inquiry.

Hier bei GOG werden -zum Glück für mich!-
Versionen angeboten die auf 32 bit Systemen
funktionieren (Linux und MS-Windows).
Es gilt nicht als bewiesen dasz Update-Versionen
von Turmoil besser sind. ;o)

Die aktuelle Version hat eine Multiplayer-Funktion. Aber schön, dass sich auch jemand an dem alten Turmoil erfreut.