Can't open any scenes or prefabs. Help!

Unity Engine
1

Alright so here’s the scoop:

It started with me updating Unity. Shortly after the update, my Substance materials stopped working. Every time I tried to Reimport them, Unity would hang and I’d have to force terminate it. I tried to Reimport All, and again Unity froze. So I downloaded the new version of Substance for Unity, imported it, and voila, my materials loaded.

But something in this whole process messed up the entire project, and now I can’t open any of my scenes and none of my prefabs will load.

I’m getting this error from scenes:

Failed to load ‘scene.unity’ because it was serialized with a newer version of Unity. (Has a higher SerializedFile version)

And trying to open a prefab gives me 3 errors:

Invalid serialized file header. File: “file.prefab”.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
Unknown error occurred while loading ‘file.prefab’.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
Opening Prefab Mode failed: The Prefab at ‘file.prefab’ is broken.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Is there anything I can try in order to recover my files? Or am I screwed?

2

Update:
I found someone on the Allegorithmic forums who’s having the same issue, so I think this is probably a problem with the new Substance plugin.
Link to the topic here: Adobe Community