Well, here is where my files got corrupted more than once, you may have accidentally closed the copying, so you should download again the game. Of course follow what daneos said before.
I'm going to re-install the game (for the second time) just in case
I noticed that the DBOG download by torrent it's outdated (It have the old launcher and I had to apply the new launcher)
What Daneos sayd didn't work for me
try to download the updater file manually
https://www.sendspace.com/file/46bq1p
Also install latest windows updates and restart the pc
I'm gonna try reinstalling the game... wish me luck!