Sure! It won’t break the install. To change the Amazon account do the following:
- From the Amazon home screen, go to Settings
- Click the circle right until you see My Account, then click the center circle.
- Click Amazon Account.
- Click Deregister. Give it a few seconds to deregister.
- The next screen will either let you use your existing amazon account (Register) or create a new amazon account (Create an account)
Below is a video we created on how to do this: