Unity 5.5 to Unity 2017 - Google VR
So I have a project for a course I'm doing, and the requirements when I started it were to do the Unity build with version 5.5, and Google SDK 1.0. Since then, they've changed the requirements, so it has to be built in Unity 2017 using Google SDK 1.70 (yeah, thanks a lot for moving the goalposts).
So I have opened the project in the latest Unity version, and got the warning about assets need to be imported again. I also know that the GVRViewerMain asset is now redundant, and should be replaced with GVREditorEmulator.
However, when I remove the old GVRViewerMain and swap in the GVREditorEmulator, when I play the game all I get is a black screen, and of course it won't build to iOS either.
When trying to retrofit like this, are there other settings I need to change or add? Or would I be best to start a new project, and start the project from scratch?