Hello There,
Please assign the license to the url that you would like to validate. After that, you have to copy and paste the license in the field where it ask you to insert an API key. The license code can be use as a replacement of the api key. I can update the sites for you but in doing so, I will be using my test license. Please post the url and login credentials of the sites that needs some updates.
Please let us know how it goes.