Steps to reproduce:
1. Delete 'Library' folder from the attached project (important)
2. Open attached project
3. Select "dotnet 35 scriptable object" in the project view and observe the inspector
4. Select "dotnet 46 scriptable object" in the project view and observe the inspector in comparison with "35 scriptable object"

Expected behavior: Assemblies built with .NET 4.6 are loaded on their first import (like 3.5)

Notes:
Reimporting the object doesn't fix the issue
Navigating to "Assets/Create/" doesn't show "New .NET 4.6 scriptable object"
In 2017.2.0a3 selecting "dotnet 46 scriptable object" in the project view throws null reference exception

Workaround:
Restart Unity

Reproducible with: 2017.1.0b1, 2017.1.0b10, 2017.2.0a3