Alaemortis: Sorry for retarded question. I've downloaded the game right after it appeared on GOG, got to the Ethan's Map which I can't interact with. Now I've noticed patches got released but how and from where can I download these updates? Do I need to download the whole game again?
You wont need to download the whole thing again. What GOG.com has done in the past once they receive the patches from the developer, is to check them to make sure they work and don't break anything with their version of the game. Then release it as a separate patch. However they will also sometimes update the base installer, so that in the future if you somehow delete or lose your files you only have to re-download the one file. If you use the GOG.com downloader, open that and log into your GOG.com account. It should say at the top if there is an update, or even a forum reply for you.
For any technical questions like the map I'd direct those to the developers or GOG.com support. I'll say this thought, there support team is by far the best I have ever dealt with.
Hope this helps :) Happy Gaming