How to install the Feathers SDK
Download the installer for the Feathers SDK Manager for either Mac OS X or Windows.
Run the installer and follow the steps in the wizard.
Run the Feathers SDK Manager application that you just installed.
Choose the version of the Feathers SDK to install. Click Next.
Choose the versions of the Adobe AIR and Adobe Flash Player to target. Click Next.
Choose an empty directory where the Feathers SDK should be installed. Click Next.
Agree to the licenses for the Feathers SDK and each of its dependencies. Click Next.
The Feathers SDK Manager will download the required files, and then it will configure the SDK for your system. This process may require several minutes.
From here, you should take a look at the instructions for adding the Feathers SDK to your favorite development environment.