On the Home page of the GUI look for the button marked "Default", click the button and then the "Continue Default" button to default the unit.
You can also default the Xroads via the console port using Default and confirmdefault.
If you are on 4.1 firmware and below the console speed will be 9600.
If your on 4.5 firmware the console speed will be 38400.
If your on 5.1 firmware the console speed will be 115200
If you have a UBM500 or higher there is a connection on the back of the unit for a screen and keyboard.
Defaulting takes approx. 90 seconds.
After defaulting the unit will be accessible via the LAN interface on IP address 192.168.168.254.