Errors when opening Shader Forge. How to decide?

Question

Game development

I downloaded SF, honestly, without buying - From here .
I transfer to Unity, but when opening SF, it throws errors:
1)
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()
2)
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/MonoM ethod.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/MonoM ethod.cs:232) System.Reflection.MethodBase.Invoke(System.Object obj, System.
3)
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()
Mb who faced this and found the answer ?
Unity version: 2017.1.1f1