Update: Not in UK either
The UK download site still hasn't been updated to version 4.0. I used a proxy server to obtain a copy of the 4.0 software from the U.S site.
The software refused to accept my login information, which I knew was quite likely, but I just wanted to check.
So now I've rolled back to 18.104.22.168 and shall sit quietly and wait for America to realise other countries exist.