Thanks for the reply. Have followed those instructions and it’s still not there. Have checked I’m running the latest updates etc, and also rebooted etc.
I came to have a moan about this too. I accept the 4 device limit, it's ridiculous but it is what it is. What bugs me the most is that once I remove a device I can't add another device for 30 days. I bought a samsung tablet, it turned out to be fault...