Does v4 still not recognise premium accounts ?
I have premium working in older version of client, but i v4 it wont.  Cannot update all.

Log out, and back into, the client.

I have logged out and in, closed client and reopened, uninstalled deleted leftovers then reinstalled.  Even tried fresh windows install.

Still the same thing is happening.  My account isnt being recognised as a 'premium' one.

you account isn't recognised as a premium on the webside either.

I suggest you to mail the curse team to get the issue resolved.