If you own an Airfoil for Windows license key that starts with HLFZ-, move up to the latest version for just $15. Download Airfoil for Windows 5 and try it out, then use the form on this page to access your heavily-discounted upgrade.
Using the Form
Enter your existing Airfoil license key below. Be sure to enter both the Name and Code portions as sent to you. Once you enter your license key, it will be automatically verified and you'll be forwarded to our store to make a discounted purchase.