None that I know of, but if you need it for free, you can always pirate it of course lol. Alternatively, I'd recommend looking it up on google
Actually, I just thought of something: Do I really need Winrar or something similar for updating?
If you cant use winrar or cannot afford it, you can install 7zip, being a free alternative
Winrar or other programs similar to it are needed, as the game comes in a compressed file (.rar or .zip, cant remember)