Installing and upgrading help

To other people with the same problem: I was testing Moodle in a local server that didn´t have sendmail installed. That means I couldn´t ask the system to send me a new password by email. I did what some others have suggested in other posts: used phpMyAdmin (you can use any application that lets you look into the database) to copy and paste the known codified password of another user to the password field of the admin account. Now you can log in using admin user and that password.