I don't know why.. but I can't start on the WIN 64 bit the game... the wallet start, but nothing happened when i pressed the "play to mine" also i can't see the replays(
And you've installed the x86 runtimes even though your computer is compatible with the x64 runtimes?
The x64 runtimes aren't compatible with the game.
Download Link:
http://www.microsoft.com/en-us/download/details.aspx?id=40784