If at anytime after set up, you unpair and need to manually repair your Arc, just follow the steps below:

From your home screen in the App, click on the three lines at the top left corner of your screen and open the left hand menu. 

From the menu options, choose “My Devices”.

Then click the small plus mark in the my devices section at the top.

Choose the product you wish to pair from the bottom, in this case "KATANA Arc".

On the next screen press the red start pairing button at the bottom and then choose your Bluetooth ID when it shows as an option. You will get a green check mark (pairing confirmation) on the screen when successful.