It is not so difficult to uninstall Adobe Air if you have the relative experience. But I still remember the first time when I tried to remove it. It really took me long time then I found it could be deleted in control panel directly. Now how about the Ubuntu? If you still remain the file *.air, then congratulation. What you do is just double click the file and choose the option Uninstall. But if you have deleted it after installed, what can you do? Please follow these steps given by wanfahmi.