I’d been logged in continuously for two or three days, working through the tutorials as I work on my site. I’d also put in a couple of support questions and received answers (thanks for that).
Suddenly I’d been logged out. When I clicked on ‘login’ I was taken to the home page instead.
Having left it for a couple of hours I have been able to log in again, but still can’t access the premium theme setup: When I click on the button I get to a page saying that I need membership. But I already have that (for the circumference theme).