*Reproducible on:*
* "main" branch
* Release candidate 1.4.13
* Platform: Window 10
* Unity version: 2020.1.3f1 and 2019.4.8f1

*Steps to Reproduce:*
* Create a fresh project
* Install Bolt
* Open the graph windows (Windows->Graph)
* Close the editor
* Reopen the project

*Outcome Results:*

{code:java}
NullReferenceException: Object reference not set to an instance of an object
Ludiq.LudiqGraphs.get_Configuration () (at Assets/Ludiq/Ludiq.Graphs/Editor/Plugin/LudiqGraphs.cs:22)
Ludiq.GraphWindow.get_showSidebars () (at Assets/Ludiq/Ludiq.Graphs/Editor/Windows/GraphWindow.cs:685)
Ludiq.GraphWindow.OnGUI () (at Assets/Ludiq/Ludiq.Graphs/Editor/Windows/GraphWindow.cs:423)
UnityEditor.HostView.InvokeOnGUI (UnityEngine.Rect onGUIPosition, UnityEngine.Rect viewRect) (at <701f6580abad44cfb237a543dcd0d94b>:0)
UnityEditor.DockArea.DrawView (UnityEngine.Rect viewRect, UnityEngine.Rect dockAreaRect) (at <701f6580abad44cfb237a543dcd0d94b>:0)
UnityEditor.DockArea.OldOnGUI () (at <701f6580abad44cfb237a543dcd0d94b>:0)
UnityEngine.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 parentTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout, UnityEngine.Rect layoutSize, System.Action onGUIHandler, System.Boolean canAffectFocus) (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)

NullReferenceException: Object reference not set to an instance of an object
Ludiq.LudiqGraphs.get_Configuration () (at Assets/Ludiq/Ludiq.Graphs/Editor/Plugin/LudiqGraphs.cs:22)
Ludiq.GraphWindow.get_showSidebars () (at Assets/Ludiq/Ludiq.Graphs/Editor/Windows/GraphWindow.cs:685)
Ludiq.GraphWindow.OnGUI () (at Assets/Ludiq/Ludiq.Graphs/Editor/Windows/GraphWindow.cs:423)
UnityEditor.HostView.InvokeOnGUI (UnityEngine.Rect onGUIPosition, UnityEngine.Rect viewRect) (at <701f6580abad44cfb237a543dcd0d94b>:0)
UnityEditor.DockArea.DrawView (UnityEngine.Rect viewRect, UnityEngine.Rect dockAreaRect) (at <701f6580abad44cfb237a543dcd0d94b>:0)
UnityEditor.DockArea.OldOnGUI () (at <701f6580abad44cfb237a543dcd0d94b>:0)
UnityEngine.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 parentTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout, UnityEngine.Rect layoutSize, System.Action onGUIHandler, System.Boolean canAffectFocus) (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.UIElements.IMGUIContainer.HandleIMGUIEvent (UnityEngine.Event e, UnityEngine.Matrix4x4 worldTransform, UnityEngine.Rect clippingRect, System.Action onGUIHandler, System.Boolean canAffectFocus) (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.UIElements.IMGUIContainer.DoIMGUIRepaint () (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.UIElements.UIR.RenderChainCommand.ExecuteNonDrawMesh (UnityEngine.UIElements.UIR.DrawParams drawParams, System.Single pixelsPerPoint, System.Exception& immediateException) (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
Rethrow as ImmediateModeException
UnityEngine.UIElements.UIR.RenderChain.Render () (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.UIElements.UIRRepaintUpdater.Update () (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.UIElements.VisualTreeUpdater.UpdateVisualTreePhase (UnityEngine.UIElements.VisualTreeUpdatePhase phase) (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.UIElements.Panel.UpdateForRepaint () (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.UIElements.Panel.Repaint (UnityEngine.Event e) (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.UIElements.UIElementsUtility.DoDispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.UIElements.UIElementsUtility.UnityEngine.UIElements.IUIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& eventHandled) (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.UIElements.UIEventRegistration.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.UIElements.UIEventRegistration+<>c.<.cctor>b__1_2 (System.Int32 i, System.IntPtr ptr) (at <9c9fa79efe9e479a8cbe7a6f99f673d3>:0)
UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr, System.Boolean& result) (at <2500dd078a544a69b6c923861af6cd15>:0)
{code}

*Expected Results:*
* Error message should not appear inm the console