Implemented ApplyUpdates method to reload the scene after updates were downloaded

Assets/Resources/UI/UpdaterView.prefab

@@ -2430,7 +2430,7 @@ MonoBehaviour:
     m_PersistentCalls:
       m_Calls:
       - m_Target: {fileID: 114612701476717838}
-        m_MethodName: ExitView
+        m_MethodName: ApplyUpdates
         m_Mode: 1
         m_Arguments:
           m_ObjectArgument: {fileID: 0}

Assets/RothenburgAR/Scripts/AppInitializerBehaviour.cs

@@ -63,5 +63,10 @@ namespace RothenburgAR
                               " Exhibitions of Path " + currentPaths + " of " + maxPaths + " paths.</color>");
                 });
         }
+
+        private void OnDestroy()
+        {
+            VuforiaARController.Instance.UnregisterVuforiaInitializedCallback(InitializeData);
+        }
     }
 }

Assets/RothenburgAR/Scripts/Common/Singleton.cs

@@ -1,4 +1,5 @@
-using UnityEngine;
+using RothenburgAR.UI;
+using UnityEngine;
 
 namespace RothenburgAR.Common
 {
@@ -32,7 +33,7 @@ namespace RothenburgAR.Common
                 {
                     if (_instance == null)
                     {
-                        _instance = (T) FindObjectOfType(typeof(T));
+                        _instance = (T)FindObjectOfType(typeof(T));
 
                         if (FindObjectsOfType(typeof(T)).Length > 1)
                         {
@@ -68,6 +69,12 @@ namespace RothenburgAR.Common
 
         private static bool applicationIsQuitting = false;
 
+        public virtual void ResetInstance()
+        {
+            Destroy(_instance.gameObject);
+            _instance = null;
+        }
+
         /// <summary>
         /// When Unity quits, it destroys objects in a random order.
         /// In principle, a Singleton is only destroyed when application quits.
@@ -77,6 +84,10 @@ namespace RothenburgAR.Common
         /// So, this was made to be sure we're not creating that buggy ghost object.
         /// </summary>
         public void OnDestroy()
+        {
+        }
+
+        private void OnApplicationQuit()
         {
             applicationIsQuitting = true;
         }

Assets/RothenburgAR/Scripts/UI/SettingsManager.cs

@@ -1,8 +1,8 @@
 using System.IO;
 using Newtonsoft.Json;
-using RothenburgAR.UI;
+using RothenburgAR.Common;
 
-namespace RothenburgAR.Common
+namespace RothenburgAR.UI
 {
     class SettingsManager : Singleton<SettingsManager>
     {

Assets/RothenburgAR/Scripts/UI/UpdaterViewBehaviour.cs

@@ -1,5 +1,9 @@
-using RothenburgAR.Updater;
+using RothenburgAR.Exhibition;
+using RothenburgAR.PointOfInterest;
+using RothenburgAR.Updater;
+using System.Collections.Generic;
 using UnityEngine;
+using UnityEngine.SceneManagement;
 
 namespace RothenburgAR.UI
 {
@@ -11,18 +15,26 @@ namespace RothenburgAR.UI
         public GameObject UpdateCompletedDialog;
         public GameObject UpdateFailedDialog;
 
+        private bool allowAbort = true;
+
         private UpdateState lastUpdateState = UpdateState.UpdatesFound;
 
         private void Start()
         {
-            UIManager.Instance.StartingUp = false;
-
             UpdateDialog.SetActive(true);
             UpdateConfirmationDialog.SetActive(false);
             UpdateCompletedDialog.SetActive(false);
             UpdateFailedDialog.SetActive(false);
             ProgressBar.value = 0;
             ProgressBar.maxValue = 1;
+
+            if (UIManager.Instance.StartingUp)
+            {
+                allowAbort = false;
+                //TODO disable all ExitView() calls in UI and ensure they are not enabled otherwise
+            }
+
+            UIManager.Instance.StartingUp = false;
         }
 
         private void Update()
@@ -53,7 +65,7 @@ namespace RothenburgAR.UI
 
                 case UpdateState.Completed:
                     UpdateCompletedDialog.SetActive(true);
-                    //TODO add "apply upgrades" button or sth that Destroys all DontDestroyOnLoads and reloads the scene, use AppInitializerBehaviour for that
+                    //TODO add "apply upgrades" button which Destroys all DontDestroyOnLoads and reloads the scene 
                     break;
 
                 case UpdateState.Failed:
@@ -72,5 +84,24 @@ namespace RothenburgAR.UI
             UIManager.Instance.SwitchToView(ViewName.ARView);
         }
 
+        public void ApplyUpdates()
+        {
+            //DisplayManager.ResetInstance();
+
+            LanguageManager.Instance.ResetInstance();
+            InputManager.Instance.ResetInstance();
+
+            UIManager.Instance.ResetInstance();
+            UpdateManager.Instance.ResetInstance();
+            SettingsManager.Instance.ResetInstance();
+
+            PoiDataManager.Instance.ResetInstance();
+            ExhibitionManager.Instance.ResetInstance();
+
+            UIColorSchemeManager.Instance.ResetInstance();
+            FontsizeManager.Instance.ResetInstance();
+
+            SceneManager.LoadScene("mainScene");
+        }
     }
 }