All device slots are filled

I installed the new beta, but upon logging in, I’m informed that “All device slots are filled.” However, I cannot log out of those devices, because they too are updated to Sequoia. When I open the app on them, I’m prompted to log in. I do so and I’m told that I can launch and enjoy Sublab. But because I can’t close that pop up, I cannot log out of the other devices. How do I free up those seats?

Ah ok…can you send me your activation code via PM? I’ve sent you a message just now and if you reply to that…