Looks like some ol' steam cache is still releasing 1.0.3 to people instead of 1.0.5 which isn't right.
If you see your game is this old version, or you have some strange problems, please exit the game and verify the integrity of your game cache via steam.
EDIT Running a laptop and have performance issues? Make sure you're not using the integrated GPU (this is especially a potential problem if you're running Windows 8.1)
EDIT Got new game / load game greyed or blacked out? This means there's something bad with the installation. Try verifying cache, reinstalling, restarting stream and see if that solves the issue!
EDIT For MAC USERS that are seeing grey menu items, this is a permission problem!
1) Launch Finder. 2) Menu: Go > Go to folder. Enter ~/.config/ 3) Select .config and press ⌘-I to open folder properties 4) In sharing and permission change all access from Read to Read and write. 5) Launch the game.