Adobe AIR is installed in a few places on your machine.
There are some files in /Applications/Utilities folder. If
you open this folder, you should see files such as the Uninstaller.
But you normally don't need to know where the files are.
If you want to use an AIR application, get the AIR file,
install it and launch it.
Once the application is installed, the app should be in
Applications folder just like any other application.