I've just spent several hours trying to upgrade my older version of wordpress to the latest version. Eventually it worked, but it seemed to get rid of most of the data in the database at the same time, finally got that sorted by importing the backup copy. BUT, now I can't login at all.
I decided to just request a new password, but the site won't recognise my username or any of the email addresses I normally use.
PLEASE, I'm now at my wit's end trying to find out who on earth I am, so that I can request a new password.