diff --git a/app/src/main/java/uk/org/openseizuredetector/MainActivity.java b/app/src/main/java/uk/org/openseizuredetector/MainActivity.java
index 603360d..2b98bf8 100644
--- a/app/src/main/java/uk/org/openseizuredetector/MainActivity.java
+++ b/app/src/main/java/uk/org/openseizuredetector/MainActivity.java
@@ -1087,6 +1087,25 @@ public class MainActivity extends AppCompatActivity {
         super.onResume();
         Log.i(TAG, "onResume()");
         mUtil.writeToSysLogFile("MainActivity.onResume()");
+
+        // Check to see if the user has asked for the new user interface to be used instead of this one
+        // and start that if necessary.
+        try {
+            SharedPreferences SP = PreferenceManager
+                    .getDefaultSharedPreferences(getBaseContext());
+            boolean useNewUi = SP.getBoolean("UseNewUi", false);
+            if (useNewUi) {
+                Log.i(TAG,"onResume() - launching new User Interface");
+                Intent intent = new Intent(
+                        getApplicationContext(),
+                        MainActivity2.class);
+                intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
+                startActivity(intent);
+                finish();
+            }
+        } catch (Exception ex) {
+            Log.e(TAG, "exception starting main activity " + ex.toString());
+        }
     }
 
 
diff --git a/app/src/main/java/uk/org/openseizuredetector/MainActivity2.java b/app/src/main/java/uk/org/openseizuredetector/MainActivity2.java
index a6bd0c2..d711c06 100644
--- a/app/src/main/java/uk/org/openseizuredetector/MainActivity2.java
+++ b/app/src/main/java/uk/org/openseizuredetector/MainActivity2.java
@@ -136,6 +136,24 @@ public class MainActivity2 extends AppCompatActivity {
                 .add(R.id.fragment_common_container_view, FragmentCommon.class, null)
                 .commit();
 
+        // Check to see if the user has asked for the original user interface to be used instead of this one
+        // and start that if necessary.
+        try {
+            SharedPreferences SP = PreferenceManager
+                    .getDefaultSharedPreferences(getBaseContext());
+            boolean useNewUi = SP.getBoolean("UseNewUi", false);
+            if (!useNewUi) {
+                Log.i(TAG,"onResume() - launching original User Interface");
+                Intent intent = new Intent(
+                        getApplicationContext(),
+                        MainActivity.class);
+                intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
+                startActivity(intent);
+                finish();
+            }
+        } catch (Exception ex) {
+            Log.e(TAG, "exception starting main activity " + ex.toString());
+        }
     }
 
 
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index d2179b0..d41503d 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -3,7 +3,8 @@
     <string name="app_name">OpenSeizureDetector</string>
     <string name="changelog">
         "\n
-        \nV4.2.1 - Added Machine Learning Model Manager so models can be updated easily.
+        \nV4.2.1 - Added support for PineTime Watches using Bluetooth data source.
+        \n       - Added new, swipeable user interface to simplify the main screen..
           "</string>
     <string name="UpgradeMsg">
         Please enable the new &lt;b>Data Sharing&lt;/b> feature to help improve OpenSeizureDetector!&lt;br/>