I've followed the instructions but they haven't worked.
How do I
1.Rename this computer as it would appear in:
a. Ubuntu One Preferences --> Devices; and [next line]
b. https://one.ubuntu.com/account/ --> Devices
After you sign in to Ubuntu One via your web browser you should see the Add this Computer button.
I am on the unfortunate side of that 'should'. There is no Add this Computer button.