How can i manually uninstall adobe air?

I’ve messed up my adobe air installation by deleting some folders with app cleaner whilst deleting tweetdeck…!! now every time i try to reinstall adobe air it tells me that the programme is already installed and stops the installation process. i must solve this because i have little error windows showing up ever few minutes telling me adobe air is not working properly(crowds the screen up very fast)....... help..!!!