Following the instructions here
Launch the installation script of your site: http://yousite/install.php
After completing the information, click Save. You should then see the following.
If you want to run install.php again you will need to delete wpt_monitor.sqlite from the ./db/ directory.
Click continue and you should be presented with the login page.
If you enabled registration by checking the Enable Registration checkbox during installation you should see the "Register" link on the login page. If not, you will only be able to log in as the admin user you created during installation.
At this point you can log in as the admin user, or register as a regular user. Admin users have the ability to assume the identity of any user on the system, as well as add new hosts, locations, and modify the configuration.
Click Register