Hello @Dan Gadd,
You can find your license key in the original order email.
You can also contact billing team to request the key to be re-sent to you.
Your license key can also be found in your install directory in the Wowza Streaming Engine folder where the arrow is pointing, inside there is a folder named Conf. Click on that Config folder in there, you will see a file named “Server.license”
Regards,
Alex C.