Unity 5 AutoSave on Run & on 1-10 minutes interval

AutoSave.cs

using UnityEngine;
using UnityEditor;
using System;
using UnityEditor.SceneManagement;
using UnityEngine.SceneManagement;

namespace NirSoft.UtilityEditor
{
    /// <summary>
    /// Autosave scene on run.
    /// </summary>
    [ InitializeOnLoad ]
    public class AutosaveOnRun
    {
        static AutosaveOnRun()
        {
            EditorApplication.playmodeStateChanged = () =>
            {
                Scene activeScene = EditorSceneManager.GetActiveScene();
                if ( !EditorApplication.isPlayingOrWillChangePlaymode || EditorApplication.isPlaying || !activeScene.isDirty ) return;
                Debug.Log( "Auto-Saving scene before entering Play mode: " + activeScene.name );
                EditorSceneManager.SaveScene( activeScene );
                EditorApplication.SaveAssets();
            };
        }
    }

    /// <summary>
    /// This script creates a new window in the editor with a autosave function. 
    /// It is saving your current scene with an interval from 1 minute to 10 minutes.
    /// The config window is in on Window/AutoSave
    /// </summary>
    public class AutoSave : EditorWindow
    {
        private bool autoSaveScene = true;
        private bool showMessage = true;
        private bool isStarted = false;
        private int intervalScene;
        private DateTime lastSaveTimeScene = DateTime.Now;

        private readonly string projectPath = Application.dataPath;

        [ MenuItem( "Window/AutoSave" ) ]
        static void Init()
        {
            AutoSave saveWindow = ( AutoSave ) EditorWindow.GetWindow( typeof ( AutoSave ) );
            saveWindow.Show();
        }

        void OnGUI()
        {
            GUILayout.Label( "Info:", EditorStyles.boldLabel );
            EditorGUILayout.LabelField( "Saving to:", "" + projectPath );
            EditorGUILayout.LabelField( "Saving scene:", "" + EditorSceneManager.GetActiveScene().name );
            GUILayout.Label( "Options:", EditorStyles.boldLabel );
            autoSaveScene = EditorGUILayout.BeginToggleGroup( "Auto save", autoSaveScene );
            intervalScene = EditorGUILayout.IntSlider( "Interval (minutes)", intervalScene, 1, 10 );
            if ( isStarted )
            {
                EditorGUILayout.LabelField( "Last save:", "" + lastSaveTimeScene );
            }
            EditorGUILayout.EndToggleGroup();
            showMessage = EditorGUILayout.BeginToggleGroup( "Show Message", showMessage );
            EditorGUILayout.EndToggleGroup();
        }


        void Update()
        {
            if ( autoSaveScene )
            {
                if ( DateTime.Now.Minute >= ( lastSaveTimeScene.Minute + intervalScene ) || DateTime.Now.Minute == 59 && DateTime.Now.Second == 59 )
                    SaveScene();
            }
            else
                isStarted = false;
        }

        void SaveScene()
        {
            EditorSceneManager.SaveScene( EditorSceneManager.GetActiveScene() );
            lastSaveTimeScene = DateTime.Now;
            isStarted = true;
            if ( showMessage )
                Debug.Log( "AutoSave saved: " + EditorSceneManager.GetActiveScene().name + " on " + lastSaveTimeScene );
            var repaintSaveWindow = ( AutoSave ) GetWindow( typeof ( AutoSave ) );
            repaintSaveWindow.Repaint();
        }
    }
}