I downloaded and unpacked the 6 GB file, started and pressed “New game”. And then it showed a screen with a pulsing blue sphere and hanged there. Waited for several minutes, then killed it. Tried again, the same result.
Verdict: the game does not start. Noreover, it seems it loads the Internet connection while running. So maybe it’s downloading something, but there is nothing on UI that can tell about it. Windows 10, 64 bits.