Thanks for the reply, but that is not right:
That message just means that paid users can choose their preferred app. Free users have to use Google Authenticator.
And anyway, there is no way to enable an email or text option for a free user. The process requires receiving a text message and verifying it before anything can happen. Here is where it gets stuck:
If I click on the "Didn't receive" link the whole thing starts again.
PS I was a subscriber before, for several years.