How can I uninstall Adobe Air on Lion?
To uninstall AdobeAIR by hand, quit any unnecessary applications (specially applications that might use AdobeAIR). Then delete the following files and folders.

/Applications/Adobe/Flash Player/AddIns/airappinstaller (alternatively remove the /Applications/Adobe folder - first checking that its sub-folders do not contain files other than AdobeAIR files.)

/Applications/Utilities/Adobe AIR Application Installer.app

/Applications/Utilities/Adobe AIR Uninstaller.app

/Library/Frameworks/Adobe AIR.framework

/Users/Shared/Library/Application Support/Adobe/AIR (alternatively remove the /Users/Shared/Library folder - first checking that its sub-folders do not contain files other than AdobeAIR files.)

The following files are in your Home Folder (represented by '~'). You can access this Library folder by holding down ⌥ while accessing the Finder menu Go > Library.

~/Library/Application Support/Adobe/AIR (alternatively remove the ~/Library/Application Support/Adobe folder - first checking that its sub-folders do not contain files other than AdobeAIR files.)

~/Library/Caches/com.adobe.air.ApplicationInstaller

~/Library/Caches/com.adobe.air.Installer

~/Library/Preferences/com.adobe.air.ApplicationInstaller.plist

~/Library/Preferences/com.adobe.air.ApplicationInstaller.plist.lockfile

~/Library/Preferences/Macromedia/Flash Player/#Security/FlashPlayerTrust/air.1.0.trust.cfg

~/Library/Preferences/Macromedia/Flash Player/www.macromedia.com/bin/airappinstaller

These files were found by scanning the file system before and after installing the latest version of AdobeAIR to see the file changes that were made.