Staying in scene view after pressing play

Unity Engine
1

Always after I press play the Editor switch to game view. But I want to stay in scene view. In the tutorial videos I saw that this is possible, but how?

2

Found on stack overflow and checked in unity:

using UnityEngine;
using System.Collections;

public class KeepSceneAliveScript : MonoBehaviour
{
    public bool KeepSceneViewActive;

    void Start()
    {
        if (this.KeepSceneViewActive && Application.isEditor)
        {
            UnityEditor.SceneView.FocusWindowIfItsOpen(typeof(UnityEditor.SceneView));
        }
    }
}
3

The script is working fine. Thank you.

4

This script is making Unity Crash