Editor window bool value changes to false when I hit play

I have a editor window. I have a bool value as a toggle. I can change the value to true and close the window. If I reopen the window it is still true. However when I click play, the value changes to false. I have even left the window open and watched it change to false. I don't know how to keep the value true.

Code (CSharp):

1. using UnityEngine;
2. using UnityEditor;
3.  
4. public class KobieWindow : EditorWindow
5. {
6.  
7.     public static bool myBool;  
8.  
9.     // Add menu named "My Window" to the Window menu
10.     [MenuItem("Window/Kobie Window")]
11.     static void Init()
12.     {
13.         // Get existing open window or if none, make a new one:
14.         KobieWindow window = (KobieWindow)EditorWindow.GetWindow(typeof(KobieWindow));
15.         window.Show();
16.     }
17.  
18.     void OnGUI()
19.     {
20.         GUILayout.Label("Play Mode Settings", EditorStyles.boldLabel);
21.         myBool = EditorGUILayout.Toggle("Load Lobby Manager", myBool);
22.      
23.     }
24. }

 

First it is static so it cannot be serialized.

Second, to persist non-static values, use Undo.RecordObject(). See docs for details of using that method.