diff --git a/app/release/app-release-4.1.4.apk b/app/release/app-release-4.1.5.apk
similarity index 68%
rename from app/release/app-release-4.1.4.apk
rename to app/release/app-release-4.1.5.apk
index d8c8fe2..182c867 100644
Binary files a/app/release/app-release-4.1.4.apk and b/app/release/app-release-4.1.5.apk differ
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index a247ce7..0599cf6 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
-    android:versionCode="118"
-    android:versionName="4.1.4">
+    android:versionCode="119"
+    android:versionName="4.1.5">
     <!-- android:allowBackup="false" -->
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
diff --git a/app/src/main/java/uk/org/openseizuredetector/ExportDataActivity.java b/app/src/main/java/uk/org/openseizuredetector/ExportDataActivity.java
index 82e1002..6da630f 100644
--- a/app/src/main/java/uk/org/openseizuredetector/ExportDataActivity.java
+++ b/app/src/main/java/uk/org/openseizuredetector/ExportDataActivity.java
@@ -22,6 +22,7 @@ import android.view.View;
 import android.widget.Button;
 import android.widget.DatePicker;
 import android.widget.EditText;
+import android.widget.ProgressBar;
 import android.widget.TimePicker;
 import android.os.ParcelFileDescriptor;
 
@@ -208,7 +209,12 @@ public class ExportDataActivity extends AppCompatActivity
             //        mDateTxt.getText().toString(), mTimeTxt.getText().toString(), mDuration));
             Log.d(TAG, String.format("EndDate=%s %s, Duration=%3.1f hrs",
                     mDateTxt.getText().toString(), mTimeTxt.getText().toString(), mDuration));
+            ProgressBar pb = (ProgressBar) findViewById(R.id.exportPb);
+            pb.setIndeterminate(true);
+            pb.setVisibility(View.VISIBLE);
 
+            mExportBtn.setEnabled(false);
+            mExportBtn.setVisibility(View.INVISIBLE);
             this.openFile();
 
         }
@@ -268,8 +274,7 @@ public class ExportDataActivity extends AppCompatActivity
                                 openFileDescriptor(uri, "w");
                         FileOutputStream fileOutputStream =
                                 new FileOutputStream(pfd.getFileDescriptor());
-                        // fileOutputStream.write(("Overwritten at " + System.currentTimeMillis() +
-                        //        "\n").getBytes());
+                        fileOutputStream.write(("# dataTime, alarmState, hr, o2sat, accel*125\n").getBytes());
                         JSONArray dataObj;
                         try {
                             dataObj = new JSONArray(datapointsJsonStr);
@@ -319,6 +324,17 @@ public class ExportDataActivity extends AppCompatActivity
                         mUtil.showToast(getString(R.string.error_exporting_data));
                         Log.e(TAG, "exportToFile() - IOException: " + e.toString());
                     }
+                    runOnUiThread(new Runnable() {
+                        public void run() {
+                            ProgressBar pb = (ProgressBar) findViewById(R.id.exportPb);
+                            pb.setIndeterminate(true);
+                            pb.setVisibility(View.INVISIBLE);
+                            mExportBtn.setEnabled(true);
+                            mExportBtn.setVisibility(View.VISIBLE);
+
+                        }
+                    });
+
                 });
     }
 
diff --git a/app/src/main/res/layout/activity_dbquery.xml b/app/src/main/res/layout/activity_dbquery.xml
index a073818..23d97a4 100644
--- a/app/src/main/res/layout/activity_dbquery.xml
+++ b/app/src/main/res/layout/activity_dbquery.xml
@@ -3,17 +3,18 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">
+
     <TextView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="Export Local Data"
-        android:textStyle="bold"
-        />
+        android:textStyle="bold" />
+
     <TextView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="End Date/Time (dd-mm-yyyy hh:mm)"
-        />
+        android:text="End Date/Time (dd-mm-yyyy hh:mm)" />
+
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -25,15 +26,16 @@
             android:layout_height="wrap_content"
             android:ems="10"
             android:text="(end date)" />
+
         <Button
+            android:id="@+id/dateBtn"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="Select Date"
-            android:id="@+id/dateBtn"
-        />
+            android:text="Select Date" />
 
 
     </LinearLayout>
+
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -45,33 +47,45 @@
             android:layout_height="wrap_content"
             android:ems="10"
             android:text="(end time)" />
+
         <Button
+            android:id="@+id/timeBtn"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="Select Time"
-            android:id="@+id/timeBtn"
-            />
+            android:text="Select Time" />
 
 
     </LinearLayout>
+
     <TextView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Duration (hrs)"
-        />
+        android:text="Duration (hrs)" />
+
     <EditText
         android:id="@+id/durationText"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:inputType="numberDecimal"
         android:ems="10"
+        android:inputType="numberDecimal"
         android:text="1.0" />
 
-    <Button
-        android:layout_width="wrap_content"
+    <LinearLayout
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Export Data"
-        android:id="@+id/exportBtn"
-        />
+        android:orientation="horizontal">
+
+        <Button
+            android:id="@+id/exportBtn"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Export Data" />
+
+        <ProgressBar
+            android:id="@+id/exportPb"
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            android:visibility="invisible" />
+    </LinearLayout>
 
 </LinearLayout>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 6bcf5e4..2f108a3 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -3,6 +3,7 @@
     <string name="app_name">OpenSeizureDetector</string>
     <string name="changelog">
         "\n
+        \nV4.1.5 - Added progress notification to data export, added header to exported .csv file, fixed another notification bug.
         \nV4.1.4 - Fixed bug in notifications on Android 12, added an Export Data function to save heart rate and accelerometer data to a file.
         \nV4.1.3 - Fixed display of O2 Saturation in Network Data Source, and added Polish Translations by Jacek Błoniarz-Łuczak.  Fixed crash when displaying main activity during alarm on some devices.  Added adaptive Heart Rate alarms
         \nV4.1.2 - Added Machine Learning (Artificial Intelligence) Detection Algorithm Option (CNN V0.24) and 'Normal Daily Activity (NDA) logging function