I have successfuly migrated my account and received the free expansion (thanks for that).
Everything went well and all products authorised, however when I run the standalone, or the plugin, the UI is greyed out with a message that BFD has been disabled as it needs authorised and to please run the license manager. I click the button and the license manager comes up, but everything is authorised.
After much mucking about and several re-installs to try and get this working I eventually found out that unless the standalone and the DAW have access to the internet they are considered not authorised. This leads me to the conclusion that both the plugin and the stand alone version are checking authorisation every time they are run.
So, if your internet is down then BFD will not work, if you want to run offline BFD wil not work, if you have a tightly locked down PC, that limits outgoing connections, then BFD will not work. Suffice to say that I have now restored my PC back to it’s original state and am now on version 3.3. Of course now the free expansion doesn’t work.
I really hope this is a bug and not by design.
Windows 10 Pro version 20H2
 posted this 3 days ago but my account was only just unlocked. I see now that other people are having the same problem and that the developers are aware of it.