Maybe antivirus deletes some files, try to disable it when unpacking. If you downloaded from Mega, try downloading from Google drive. On mega sometimes something strange with downloaded archives happens, I don't know what the reason is. I've already reloaded the archive there... Most users don't have this problem, otherwise I'd have people write to me about it on Patreon, I actively correspond with subscribers. But everyone has everything working, the archive opens and the game launches