Ok, i need help

I've just installed RTW, it works fine. But it's version 1.0, so i set out to get the 1.3 and 1.5 patches but every time i Dl the stupid thing it goes to Winzip which i don't have and don't want to buy. Any good way around this. I DL'd barborum easy enough by one of the links on this thread but why is just RTW givin me such a hard time.