Sims 3 CC won't install?

When i got the sims 3, i didn't install the download manager because i never needed it for the sims 2, but whenever i go to the sims 3 website exchange and download something the launcher opens(like usual) but says it can't connect to the download manager(because i don't have it) and the downloads don't appear in the downloads tab. How can i get the CC on the game? or how can i easily do it from websites like mod the sims 3?i have winRAR and I always do it like i did for the sims 2 but that won't work.