How to reproduce:
1. Create a new Unity project
2. Download the Shader Graph package
3. Create a PBR Graph and add Texture 3D Asset Node
4. Save Asset then close it and try to open again

Expected result: Shader Graph is opened in Shader Editor
Actual result: Shader Graph is opened in Visual Studio and Exception is thrown

Reproducible with: 2019.2.2f1, 2019.3.0a11 (Shader Graph 6.7.1 - 6.9.0)
Not reproducible with: 2018.4.7f1 (Shader Graph 2.0.6 - 4.10.0), 2019.2.2f1, 2019.3.0a11, 2020.1.0a1 (Shader Graph 6.5.2, 6.5.3, 6.9.1 - 7.0.1)
Could not test with: 2017.4.32f1 (Shader Graph not available)

Could not test with package versions: 0.1.21, 2.0.5, 5.1.0, 5.16.1 (incompatible with the versions tested)