I have uninstalled illustrator CC because i have installed it with the wrong preference settings, and now its say that its up to date, and doesn't give me the option to install.
Quit the Creative Cloud app and then launch it again. On selecting the "Apps" tab will refresh the list & you will see that AI CC is gone from the "Up to date" list. You can now install AI under the labels "All Apps" or "Find New Apps".
If this doesn't work than try a sign out/sign in in the Creative Cloud App.