jiggura: Haha, hence the topic. As unexpirienced person I wanted to see if this other version works or if it's the same as CD one. So I've installed it and it worked when launched from installation ending window. Then I've decided to uninstall the CD version. Because, if something was "wrong" or "different" with the GOG version I would have to go through the process of reinstalling the game with CDs which is rather long(er) and annoying at this moment. But, I've reinstalled the GOG version and it works fine now. Thank you :)