diff --git a/Augendiagnose/res/drawable/circle.xml b/Augendiagnose/res/drawable/circle.xml
deleted file mode 100644
index 303ff1ea..00000000
--- a/Augendiagnose/res/drawable/circle.xml
+++ /dev/null
@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<bitmap
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:src="@drawable/ic_circle"
-    android:gravity="center_vertical|center_horizontal"/>
\ No newline at end of file
diff --git a/Augendiagnose/res/values-de/strings.xml b/Augendiagnose/res/values-de/strings.xml
index e0eb6d2d..8ad3a565 100644
--- a/Augendiagnose/res/values-de/strings.xml
+++ b/Augendiagnose/res/values-de/strings.xml
@@ -47,7 +47,6 @@
     <string name="button_switch">Tauschen</string>
     <string name="button_other_pictures">Andere Fotos</string>
     
-    <string name="toggle_overlay_circle">Kreis</string>
     <string name="toggle_overlay_1">IT 1</string>
     <string name="toggle_overlay_2">IT 2</string>
     <string name="toggle_overlay_3">IT 3</string>
diff --git a/Augendiagnose/res/values-de/strings_releasenotes.xml b/Augendiagnose/res/values-de/strings_releasenotes.xml
index 21c9f5a0..d58d9f15 100644
--- a/Augendiagnose/res/values-de/strings_releasenotes.xml
+++ b/Augendiagnose/res/values-de/strings_releasenotes.xml
@@ -48,7 +48,7 @@ Kamera benutzen. Bitte informieren Sie mich, wenn solche Probleme auftreten.</p>
         <item>Neues Overlay. Verbessertes Zooming des Overlays. Verbesserte Darstellung.</item>
         <item>Hilfeseiten für die wichtigsten Aktivitäten hinzugefügt.</item>
         <item>Die Overlay-Position wird in den Bilddateien gespeichert.</item>
-        <item>Ein weiteres (italienisches) Overlay. Bugfixes.</item>
+        <item>Ein weiteres (italienisches) Overlay. Startinformation für neue Nutzer. Bugfixes.</item>
         </string-array>
 
 </resources>
\ No newline at end of file
diff --git a/Augendiagnose/res/values/strings.xml b/Augendiagnose/res/values/strings.xml
index 71309515..0ce36a33 100644
--- a/Augendiagnose/res/values/strings.xml
+++ b/Augendiagnose/res/values/strings.xml
@@ -47,7 +47,6 @@
     <string name="button_switch">Switch</string>
     <string name="button_other_pictures">Other Pictures</string>
     
-    <string name="toggle_overlay_circle">Circle</string>
     <string name="toggle_overlay_1">IT 1</string>
     <string name="toggle_overlay_2">IT 2</string>
     <string name="toggle_overlay_3">IT 3</string>
diff --git a/Augendiagnose/res/values/strings_releasenotes.xml b/Augendiagnose/res/values/strings_releasenotes.xml
index c53f3fa2..bef9fe25 100644
--- a/Augendiagnose/res/values/strings_releasenotes.xml
+++ b/Augendiagnose/res/values/strings_releasenotes.xml
@@ -61,7 +61,7 @@ when using the app for the first time with a new device or with a new camera. Pl
         <item>Added a second custom overlay. Improved overlay pinching. Corrected some display issues.</item>
         <item>Added various help screens.</item>
         <item>Enabled storage of Overlay position within JPG file.</item>
-        <item>Added one more (Italian) overlay. Bugfixes.</item>
+        <item>Added one more (Italian) overlay. Added start screen for new users. Bugfixes.</item>
         </string-array>
 
 </resources>
\ No newline at end of file
diff --git a/Augendiagnose/src/de/eisfeldj/augendiagnose/activities/DisplayOneActivityOverlay.java b/Augendiagnose/src/de/eisfeldj/augendiagnose/activities/DisplayOneActivityOverlay.java
index 1cfabde0..a056d30d 100644
--- a/Augendiagnose/src/de/eisfeldj/augendiagnose/activities/DisplayOneActivityOverlay.java
+++ b/Augendiagnose/src/de/eisfeldj/augendiagnose/activities/DisplayOneActivityOverlay.java
@@ -69,8 +69,6 @@ protected void onCreate(Bundle savedInstanceState) {
 		imageView.mLockButton = (ToggleButton) findViewById(R.id.toggleButtonLink);
 		
 		if (!Application.isAuthorized()) {
-			toggleOverlayButtons[3].setEnabled(false);
-			toggleOverlayButtons[3].setVisibility(View.GONE);
 			toggleOverlayButtons[4].setEnabled(false);
 			toggleOverlayButtons[4].setVisibility(View.GONE);
 			toggleOverlayButtons[5].setEnabled(false);
diff --git a/Augendiagnose/src/de/eisfeldj/augendiagnose/components/EyeImageView.java b/Augendiagnose/src/de/eisfeldj/augendiagnose/components/EyeImageView.java
index eb394b98..59a7d840 100644
--- a/Augendiagnose/src/de/eisfeldj/augendiagnose/components/EyeImageView.java
+++ b/Augendiagnose/src/de/eisfeldj/augendiagnose/components/EyeImageView.java
@@ -1,5 +1,6 @@
 package de.eisfeldj.augendiagnose.components;
 
+import android.app.Activity;
 import android.content.Context;
 import android.util.AttributeSet;
 import android.widget.ImageView;
@@ -30,14 +31,14 @@ public EyeImageView(Context context, AttributeSet attrs, int defStyle) {
 	 * 
 	 * @param eyePhoto
 	 */
-	public void setEyePhoto(final EyePhoto eyePhoto, final Runnable postActivities) {
+	public void setEyePhoto(final Activity activity, final EyePhoto eyePhoto, final Runnable postActivities) {
 		this.eyePhoto = eyePhoto;
 		// Fill pictures in separate thread, for performance reasons
 		new Thread() {
 			@Override
 			public void run() {
 				eyePhoto.precalculateImageBitmap(MediaStoreUtil.MINI_THUMB_SIZE);
-				post(new Runnable() {
+				activity.runOnUiThread(new Runnable() {
 					@Override
 					public void run() {
 						setImageBitmap(eyePhoto.getImageBitmap(MediaStoreUtil.MINI_THUMB_SIZE));
diff --git a/Augendiagnose/src/de/eisfeldj/augendiagnose/components/ListPicturesForNameArrayAdapter.java b/Augendiagnose/src/de/eisfeldj/augendiagnose/components/ListPicturesForNameArrayAdapter.java
index e6cf2afe..e848f907 100644
--- a/Augendiagnose/src/de/eisfeldj/augendiagnose/components/ListPicturesForNameArrayAdapter.java
+++ b/Augendiagnose/src/de/eisfeldj/augendiagnose/components/ListPicturesForNameArrayAdapter.java
@@ -1,5 +1,6 @@
 package de.eisfeldj.augendiagnose.components;
 
+import android.app.Activity;
 import android.content.Context;
 import android.view.View;
 import android.view.ViewGroup;
@@ -14,8 +15,8 @@
  */
 public class ListPicturesForNameArrayAdapter extends ListPicturesForNameBaseArrayAdapter {
 
-	public ListPicturesForNameArrayAdapter(Context context, EyePhotoPair[] eyePhotoPairs) {
-		super(context, eyePhotoPairs);
+	public ListPicturesForNameArrayAdapter(Activity activity, EyePhotoPair[] eyePhotoPairs) {
+		super(activity, eyePhotoPairs);
 	}
 
 	public ListPicturesForNameArrayAdapter(Context context) {
@@ -44,7 +45,7 @@ public View getView(final int position, View convertView, ViewGroup parent) {
 			@Override
 			public void onClick(View v) {
 				ImageSelectionAndDisplayHandler.getInstance().cleanSelectedView();
-				DisplayTwoActivity.startActivity(ListPicturesForNameArrayAdapter.this.context, eyePhotoPairs[position]
+				DisplayTwoActivity.startActivity(ListPicturesForNameArrayAdapter.this.activity, eyePhotoPairs[position]
 						.getRightEye().getAbsolutePath(), eyePhotoPairs[position].getLeftEye().getAbsolutePath());
 
 			}
diff --git a/Augendiagnose/src/de/eisfeldj/augendiagnose/components/ListPicturesForNameBaseArrayAdapter.java b/Augendiagnose/src/de/eisfeldj/augendiagnose/components/ListPicturesForNameBaseArrayAdapter.java
index a0a5ee64..523fc915 100644
--- a/Augendiagnose/src/de/eisfeldj/augendiagnose/components/ListPicturesForNameBaseArrayAdapter.java
+++ b/Augendiagnose/src/de/eisfeldj/augendiagnose/components/ListPicturesForNameBaseArrayAdapter.java
@@ -1,5 +1,6 @@
 package de.eisfeldj.augendiagnose.components;
 
+import android.app.Activity;
 import android.content.Context;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -13,7 +14,7 @@
  * Array adapter class to display an eye photo pair in a list.
  */
 public abstract class ListPicturesForNameBaseArrayAdapter extends ArrayAdapter<EyePhotoPair> {
-	protected final Context context;
+	protected final Activity activity;
 
 	/**
 	 * Keep up to 25 rows in memory before reusing views.
@@ -22,15 +23,15 @@ public abstract class ListPicturesForNameBaseArrayAdapter extends ArrayAdapter<E
 
 	protected EyePhotoPair[] eyePhotoPairs;
 
-	public ListPicturesForNameBaseArrayAdapter(Context context, EyePhotoPair[] eyePhotoPairs) {
-		super(context, R.layout.text_view_initializing, eyePhotoPairs);
-		this.context = context;
+	public ListPicturesForNameBaseArrayAdapter(Activity activity, EyePhotoPair[] eyePhotoPairs) {
+		super(activity, R.layout.text_view_initializing, eyePhotoPairs);
+		this.activity = activity;
 		this.eyePhotoPairs = eyePhotoPairs;
 	}
 
 	public ListPicturesForNameBaseArrayAdapter(Context context) {
 		super(context, R.layout.adapter_list_pictures_for_name);
-		this.context = context;
+		this.activity = (Activity) context;
 	}
 
 	/**
@@ -59,7 +60,7 @@ public View getView(final int position, View convertView, ViewGroup parent) {
 			rowView = convertView;
 		}
 		else {
-			rowView = LayoutInflater.from(context).inflate(getLayout(), parent, false);
+			rowView = LayoutInflater.from(activity).inflate(getLayout(), parent, false);
 			cacheRange.putIntoRange(position);
 		}
 
@@ -71,7 +72,7 @@ public View getView(final int position, View convertView, ViewGroup parent) {
 		if (!imageListRight.isInitialized()) {
 			// Prevent duplicate initialization in case of multiple parallel calls - will happen in dialog
 			imageListRight.setInitialized();
-			imageListRight.setEyePhoto(eyePhotoPairs[position].getRightEye(), new Runnable() {
+			imageListRight.setEyePhoto(activity, eyePhotoPairs[position].getRightEye(), new Runnable() {
 				@Override
 				public void run() {
 					prepareViewForSelection(imageListRight);
@@ -81,7 +82,7 @@ public void run() {
 		final EyeImageView imageListLeft = (EyeImageView) rowView.findViewById(R.id.imageListLeft);
 		if (!imageListLeft.isInitialized()) {
 			imageListLeft.setInitialized();
-			imageListLeft.setEyePhoto(eyePhotoPairs[position].getLeftEye(), new Runnable() {
+			imageListLeft.setEyePhoto(activity, eyePhotoPairs[position].getLeftEye(), new Runnable() {
 				@Override
 				public void run() {
 					prepareViewForSelection(imageListLeft);
diff --git a/Augendiagnose/src/de/eisfeldj/augendiagnose/components/OverlayPinchImageView.java b/Augendiagnose/src/de/eisfeldj/augendiagnose/components/OverlayPinchImageView.java
index c60a956b..fd349ad7 100644
--- a/Augendiagnose/src/de/eisfeldj/augendiagnose/components/OverlayPinchImageView.java
+++ b/Augendiagnose/src/de/eisfeldj/augendiagnose/components/OverlayPinchImageView.java
@@ -306,28 +306,28 @@ private Drawable getOverlayDrawable(int position) {
 				break;
 			case 3:
 				if (mEyePhoto.getRightLeft().equals(RightLeft.RIGHT)) {
-					resource = R.drawable.overlay_topo3_r;
+					resource = R.drawable.overlay_topo5_r;
 				}
 				else {
-					resource = R.drawable.overlay_topo3_l;
+					resource = R.drawable.overlay_topo5_l;
 				}
 				overlayCache[position] = getColouredDrawable(resource, OVERLAY_COLOR);
 				break;
 			case 4:
 				if (mEyePhoto.getRightLeft().equals(RightLeft.RIGHT)) {
-					resource = R.drawable.overlay_topo4_r;
+					resource = R.drawable.overlay_topo3_r;
 				}
 				else {
-					resource = R.drawable.overlay_topo4_l;
+					resource = R.drawable.overlay_topo3_l;
 				}
 				overlayCache[position] = getColouredDrawable(resource, OVERLAY_COLOR);
 				break;
 			case 5:
 				if (mEyePhoto.getRightLeft().equals(RightLeft.RIGHT)) {
-					resource = R.drawable.overlay_topo5_r;
+					resource = R.drawable.overlay_topo4_r;
 				}
 				else {
-					resource = R.drawable.overlay_topo5_l;
+					resource = R.drawable.overlay_topo4_l;
 				}
 				overlayCache[position] = getColouredDrawable(resource, OVERLAY_COLOR);
 				break;
diff --git a/Augendiagnose/src/de/eisfeldj/augendiagnose/components/SelectTwoPicturesArrayAdapter.java b/Augendiagnose/src/de/eisfeldj/augendiagnose/components/SelectTwoPicturesArrayAdapter.java
index 272d9672..9a95009f 100644
--- a/Augendiagnose/src/de/eisfeldj/augendiagnose/components/SelectTwoPicturesArrayAdapter.java
+++ b/Augendiagnose/src/de/eisfeldj/augendiagnose/components/SelectTwoPicturesArrayAdapter.java
@@ -1,5 +1,6 @@
 package de.eisfeldj.augendiagnose.components;
 
+import android.app.Activity;
 import android.content.Context;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -13,19 +14,19 @@
  * Array adapter class to display an eye photo pair in a list.
  */
 public class SelectTwoPicturesArrayAdapter extends ArrayAdapter<EyePhoto> {
-	protected final Context context;
+	protected final Activity activity;
 
 	protected EyePhoto[] eyePhotos;
 
-	public SelectTwoPicturesArrayAdapter(Context context, EyePhoto[] eyePhotos) {
-		super(context, R.layout.text_view_initializing, eyePhotos);
-		this.context = context;
+	public SelectTwoPicturesArrayAdapter(Activity activity, EyePhoto[] eyePhotos) {
+		super(activity, R.layout.text_view_initializing, eyePhotos);
+		this.activity = activity;
 		this.eyePhotos = eyePhotos;
 	}
 
 	public SelectTwoPicturesArrayAdapter(Context context) {
 		super(context, R.layout.adapter_list_pictures_for_name);
-		this.context = context;
+		this.activity = (Activity) context;
 	}
 
 	/**
@@ -34,9 +35,9 @@ public SelectTwoPicturesArrayAdapter(Context context) {
 	 */
 	@Override
 	public View getView(final int position, View convertView, ViewGroup parent) {
-		final EyeImageView eyeImageView = (EyeImageView) LayoutInflater.from(context).inflate(
+		final EyeImageView eyeImageView = (EyeImageView) LayoutInflater.from(activity).inflate(
 				R.layout.adapter_select_two_pictures, parent, false);
-		eyeImageView.setEyePhoto(eyePhotos[position], new Runnable() {
+		eyeImageView.setEyePhoto(activity, eyePhotos[position], new Runnable() {
 			@Override
 			public void run() {
 				TwoImageSelectionHandler.getInstance().highlightIfSelected(eyeImageView);