If your VRidge app is stuck in Daydream mode then you need to change your Headset. To do that go to Cardboard app on your phone -> settings -> headset -> scan QR code from your cardboard viewer.
In case you have lost your Cardboard QR code - HERE you can find pre-generated QR codes for various headsets.
You can also create your own Cardboard profile specifically for your Headset and Phone. You can do that by following the steps on THIS website, and based on the parameters you typed in it will create QR code that you will have to scan in Cardboard app - https://wwgc.firebaseapp.com