I had the same problem and solved it by copied the 2 user files from database on my ISP to my PC and opened them with the MS Notepad. The 2 files were located in: yourblog/wp-content/cache/users/xxxxx. One of the users was the original admin user record and the other was the one when I changed the admin profile to my name, etc.
I just logged on as “admin” and asked for a new password. Once I logged in with the new password, I had access to the full dashboard (Write, Manage, etc.). I think I’ll be alreight if I just have to make sure I don’t change the password.