Are you asking for the ANRB SW Password? If yes:
Anyway, contact support via
http://www.airnavsystems.com/contact.php and ask them, what you asked. But give them the serialnumber of your RB too (you can find it on a lable on the bottom of the device).
Once I've lost my passwords. I contacted them and the sent me the password.
By the way, if you install your Software on the third PC Hardware it is necessary to contact support, so they can reset the installation list for your RB ID.
Hope that helps.
Ingo