I downloaded 4.2 and uploaded the new file.
I ran install.php and selected change admin password.
Changed the username and password.
exited without "loading language strings" (did not want to overwrite my previous changes)
ran Main Index - Pictures
logged in with new username/password
The login was successful but I now do not have "admin" privilages.
Is it required that the username be "admin" as I did not use that.