Simply add a new network/password within your Wi-Fi address book. Then, navigate to and click on your Dino's profile, located on your App's home screen. Within your Dino's profile, you should see a button that says "Sync Wi-Fi." Click on the sync button to ensure your Dino has the profiles within your Address Book set up.
The App will prompt you to select your Dino within your smart device's Wi-Fi settings. As long as the new network name/password has been entered into the App, your Dino should attempt to connect once it's been selected within your device's Wi-Fi settings.