I have connected to my InvizBox Go's Administration Interface and the menu on left hand side is missing, my Admin Interface looks like this:
While connected to your InvizBox Go open this link http://10.153.146.1/cgi-bin/luci/
Once the Admin Interface has loaded (the page will look like the screenshot above) open this link: http://10.153.146.1/cgi-bin/luci/wizard/complete?wizard=1
You will see the Wizard Complete page and your InvizBox Go will reboot. When you reconnect to your Go your Administration Interface will be back to normal.