You can manually acquire you Activity Key by going to your profile and using the information displayed under 'Activity Information'
Select 'My Profile' from the top bar drop down
Your key will be displayed, if you are a beta tester an additional key for testing demo mode will be available.
Then in Athena select the Activity Key chevron button
Then enter and save
Don't forget to save the change.
The key will be sent to TS12 automatically