Seems to be a common problem. I bought Optimize and received the "Congratulations" page that says:
Copy the License/Renewal Key below.
Go back to the application and paste the key in the space labeled License Key in the application.
Click the Register button in the application to complete the licensing process.
But there isn't any License Key on the page "below"... Also tried using the help center, but my email isn't valid for 24 hours. Can someone email me my license key?
Update: Thanks for the quick email response. Still not sure