diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8c199e..b9d5123 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,11 @@
 
 The following is a history of the changes made to this project.
 
-## v2.7.0 *(pre-release)*
+## v2.7.1 *(pre-release)*
+
+* Added missing purgeAircraft setting to the database. *(advanced)*
+
+## v2.7.0 *(not released)*
 
 * Added option to install dump1090-hptoa.
 * Added ADSBHub support.
diff --git a/build/portal/html/classes/template.class.php b/build/portal/html/classes/template.class.php
index 310e86b..e075026 100644
--- a/build/portal/html/classes/template.class.php
+++ b/build/portal/html/classes/template.class.php
@@ -7,7 +7,7 @@
     //                                                                                 //
     // The MIT License (MIT)                                                           //
     //                                                                                 //
-    // Copyright (c) 2015-2016 Joseph A. Prochazka                                     //
+    // Copyright (c) 2015-2019 Joseph A. Prochazka                                     //
     //                                                                                 //
     // Permission is hereby granted, free of charge, to any person obtaining a copy    //
     // of this software and associated documentation files (the "Software"), to deal   //
@@ -37,7 +37,7 @@
 
             // Check if the portal is installed or needs upgraded.
 
-            $thisVersion = "2.7.0";
+            $thisVersion = "2.7.1";
 
             if (!file_exists($_SERVER['DOCUMENT_ROOT']."/classes/settings.class.php")) {
                 header ("Location: /install/install.php");
diff --git a/build/portal/html/install/index.php b/build/portal/html/install/index.php
index 6828cc1..562c854 100644
--- a/build/portal/html/install/index.php
+++ b/build/portal/html/install/index.php
@@ -7,7 +7,7 @@
     //                                                                                 //
     // The MIT License (MIT)                                                           //
     //                                                                                 //
-    // Copyright (c) 2015-2016 Joseph A. Prochazka                                     //
+    // Copyright (c) 2015-2019 Joseph A. Prochazka                                     //
     //                                                                                 //
     // Permission is hereby granted, free of charge, to any person obtaining a copy    //
     // of this software and associated documentation files (the "Software"), to deal   //
@@ -29,7 +29,7 @@
     /////////////////////////////////////////////////////////////////////////////////////
 
     // The most current stable release.
-    $thisVersion = "2.7.0";
+    $thisVersion = "2.7.1";
 
     // Begin the upgrade process if this release is newer than what is installed.
     if (file_exists($_SERVER['DOCUMENT_ROOT'].DIRECTORY_SEPARATOR."classes".DIRECTORY_SEPARATOR."settings.class.php")) {
@@ -428,7 +428,8 @@ EOF;
             $common->addSetting('timeZone', $_POST['timeZone']);
             $common->addSetting('enableWebNotifications', FALSE);
             $common->addSetting('googleMapsApiKey', '');
-            $common->addSetting("hideNavbarAndFooter", "FALSE");
+            $common->addSetting("hideNavbarAndFooter", FALSE);
+            $common->addSetting("purgeAircraft", FALSE);
 
             if ($_POST['driver'] == "xml")
                 $common->addSetting('enableFlights', FALSE);
diff --git a/build/portal/html/install/upgrade-v2.7.1.php b/build/portal/html/install/upgrade-v2.7.1.php
new file mode 100644
index 0000000..093b43f
--- /dev/null
+++ b/build/portal/html/install/upgrade-v2.7.1.php
@@ -0,0 +1,71 @@
+<?php
+
+    /////////////////////////////////////////////////////////////////////////////////////
+    //                            ADS-B RECEIVER PORTAL                                //
+    // =============================================================================== //
+    // Copyright and Licensing Information:                                            //
+    //                                                                                 //
+    // The MIT License (MIT)                                                           //
+    //                                                                                 //
+    // Copyright (c) 2015-2019 Joseph A. Prochazka                                     //
+    //                                                                                 //
+    // Permission is hereby granted, free of charge, to any person obtaining a copy    //
+    // of this software and associated documentation files (the "Software"), to deal   //
+    // in the Software without restriction, including without limitation the rights    //
+    // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell       //
+    // copies of the Software, and to permit persons to whom the Software is           //
+    // furnished to do so, subject to the following conditions:                        //
+    //                                                                                 //
+    // The above copyright notice and this permission notice shall be included in all  //
+    // copies or substantial portions of the Software.                                 //
+    //                                                                                 //
+    // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR      //
+    // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,        //
+    // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE     //
+    // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER          //
+    // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,   //
+    // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE   //
+    // SOFTWARE.                                                                       //
+    /////////////////////////////////////////////////////////////////////////////////////
+
+    ///////////////////////
+    // UPGRADE TO V2.7.1
+    ///////////////////////
+
+    // --------------------------------------------------------
+    // Updates the version setting to 2.7.1.
+    // Add missing purgeAircraft setting to the settings table.
+    // --------------------------------------------------------
+
+    $results = upgrade();
+    exit(json_encode($results));
+
+    function upgrade() {
+        require_once($_SERVER['DOCUMENT_ROOT'].DIRECTORY_SEPARATOR."classes".DIRECTORY_SEPARATOR."common.class.php");
+        require_once($_SERVER['DOCUMENT_ROOT'].DIRECTORY_SEPARATOR."classes".DIRECTORY_SEPARATOR."settings.class.php");
+
+        $common = new common();
+        $settings = new settings();
+
+        try {
+            // Add portal navigation and footer autohide option.
+            $common->addSetting("purgeAircraft", "FALSE");
+
+            // Update the version and patch settings..
+            $common->updateSetting("version", "2.7.1");
+            $common->updateSetting("patch", "");
+
+            // The upgrade process completed successfully.
+            $results['success'] = TRUE;
+            $results['message'] = "Upgrade to v2.7.1 successful.";
+            return $results;
+
+        } catch(Exception $e) {
+            // Something went wrong during this upgrade process.
+            $results['success'] = FALSE;
+            $results['message'] = $e->getMessage();
+            return $results;
+        }
+    }
+?>
+
diff --git a/build/portal/html/install/upgrade.php b/build/portal/html/install/upgrade.php
index dee700f..7e2f713 100644
--- a/build/portal/html/install/upgrade.php
+++ b/build/portal/html/install/upgrade.php
@@ -7,7 +7,7 @@
     //                                                                                 //
     // The MIT License (MIT)                                                           //
     //                                                                                 //
-    // Copyright (c) 2015-2016 Joseph A. Prochazka                                     //
+    // Copyright (c) 2015-2019 Joseph A. Prochazka                                     //
     //                                                                                 //
     // Permission is hereby granted, free of charge, to any person obtaining a copy    //
     // of this software and associated documentation files (the "Software"), to deal   //
@@ -33,7 +33,7 @@
     $common = new common();
 
     // The most current stable release.
-    $thisVersion = "2.7.0";
+    $thisVersion = "2.7.1";
 
     // Begin the upgrade process if this release is newer than what is installed.
     if ($common->getSetting("version") == $thisVersion) {
@@ -159,6 +159,15 @@
         $version = "2.7.0";
     }
 
+    // UPGRADE TO V2.7.1
+    if ($common->getSetting("version") == "2.7.0" && $success) {
+        $json = file_get_contents("http://localhost/install/upgrade-v2.7.1.php");
+        $results = json_decode($json, TRUE);
+        $success = $results['success'];
+        $message = $results['message'];
+        $version = "2.7.1";
+    }
+
     require_once($_SERVER['DOCUMENT_ROOT'].DIRECTORY_SEPARATOR."admin".DIRECTORY_SEPARATOR."includes".DIRECTORY_SEPARATOR."header.inc.php");
 
     // Display the instalation wizard.