GOG finally released the 1.5.2-p3 update (126 mbs) for offline downloading.
But...now the, actual, game download (677 mbs) is missing!
Also, the update did not react as an update but as an install; which did update the GOG version...weird.

Hi, that is the full game! We have removed some big files that didn't need to be there.

From 677 mbs to 126 mbs; wow, that was some big files. :)

What type of files is that?