Your Canary can be reconfigured from your Console, using the remote configuration editor or over Bluetooth. To configure your Canary over Bluetooth, the device needs to be in Bluetooth configuration mode. A brand new, pristine Canary boots automatically into config mode (which can be determined by the pretty blue LED). If the device has already been configured, it boots to live mode (where the LED will turn green or red).
To re-enter config mode, disconnect the power supply and then reconnect it. While the device is booting hold down the button (LED) on top of the device until the status LED lights up. After a short while, the LED will go blue, at which point the config interface on http://setup.canary.tools will be accessible again.