Plug in a keyboard. Restart the unit, and as it boots up press C to launch configurator. Do you have a database to restore? If so restore to the \DB location (backup001.gpz) and restore using the functions button on the TOP RIGHT corner.
If starting from scratch, start in Configurator by navigating on the TOP LEFT, and start from the very bottom and work your way up. (That is from devices & setup all the way up to Employees)
If you lock yourself out reboot & press C to access configurator