If you're upgrading 4.0.x to 4.1.0 the license key does not need to be changed.
A Wowza Streaming Engine 4 key will work with all versions of Wowza Streaming Engine 4.
License keys that are issued for Wowza Media Server software won't work with the Wowza Streaming Engine software. New license keys are required. There is no charge for current Wowza customers to upgrade to Wowza Streaming Engine. Please locate your license type and then go to our
Upgrade webpage to review our upgrade policies and to request a FREE upgrade.