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Unity 2017.1.0p4 and Unity 2017.1.0p5 - Did a clean install twice. SF v1.38

NullReferenceException: Object reference not set to an instance of an object
ShaderForge.SF_PreviewWindow.SetupPreview ()
ShaderForge.SF_PreviewWindow..ctor (ShaderForge.SF_Editor editor)
ShaderForge.SF_Editor.InitializeInstance (UnityEngine.Shader initShader)
ShaderForge.SF_Editor.Init (UnityEngine.Shader initShader)



ShaderForge.SF_Editor.InitEmpty ()

NullReferenceException: Object reference not set to an instance of an object
ShaderForge.SF_Editor.Update ()
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:232)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:272)
UnityEditor.HostView.Invoke (System.String methodName) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:265)
UnityEditor.HostView.SendUpdate () (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:341)
UnityEditor.EditorApplication.Internal_CallUpdateFunctions () (at C:/buildslave/unity/build/Editor/Mono/EditorApplication.cs:109)


NullReferenceException: Object reference not set to an instance of an object
ShaderForge.SF_Editor.OnDestroy ()
UnityEditor.EditorWindow:Close()
ShaderForge.SF_Editor:Update()
UnityEditor.EditorApplication:Internal_CallUpdateFunctions()