diff --git a/src/renderer/components/Help.vue b/src/renderer/components/Help.vue
index 5118886..582e14a 100644
--- a/src/renderer/components/Help.vue
+++ b/src/renderer/components/Help.vue
@@ -1,7 +1,18 @@
+<!--
+Copyright 2020 Keith Paterson
+
+This file is part of FG Airports.
+
+FG Airports is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+FG Airports is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with FG Airports. If not, see http://www.gnu.org/licenses/.
+-->
 <template>
         <div class="leaflet-sidebar-pane" id="home">
             <h1 class="leaflet-sidebar-header">
-                Help
+                {{version}}
                 <div class="leaflet-sidebar-close"><i class="fa fa-caret-left"></i></div>
             </h1>
             <h2>Setup</h2>            
@@ -15,22 +26,20 @@
             <h2>World view</h2>
             <p>
               When zoomed out you will see circles. Their size corresponds with the number of flights. 
-              Blue means Ok. Yellow to little parking. Red no groundnet.
+              Blue means Ok. Yellow to little parking in comparison to the number of flights. Red no groundnet.
             </p>
             <h2>Edit view</h2>
             <p>
             </p>
             <ul>
-              <li>Button with ICAO code opens the Airport data in the edit tab.</li>
-              <li>The top 4 buttons in the button bar are for zooming. </li>
-              <li>Upload sends the current airport to groundweb.</li>
-              <li>Edit switches into edit mode</li>
               <li>Undo undos all changes or all changes during session</li>
               <li>Save, saves the groundnet</li>
-              <li>Draw taxiline</li>
+              <li>Check triggers the groundnet check.</li>
+              <li>Draw bi directional taxiline</li>
+              <li>Draw uni directional taxiline</li>
+              <li>Draw pushback.</li>
               <li>Add parking</li>
               <li>Remove element, removes the currently selected element</li>
-              <li>Check triggers the groundnet check.</li>
             </ul>
         </div>
 </template>
@@ -51,7 +60,9 @@
 
     },
     computed: {
-
+      version: function () {
+        return ' Flightgear Airports ' + require('electron').remote.app.getVersion()
+      }
     }
 }
 </script>
diff --git a/src/renderer/loaders/groundnet_writer.js b/src/renderer/loaders/groundnet_writer.js
index 155dbaf..4fc2c74 100644
--- a/src/renderer/loaders/groundnet_writer.js
+++ b/src/renderer/loaders/groundnet_writer.js
@@ -206,7 +206,12 @@ var mapParkings = function (o) {
             console.debug(o.options.attributes.airlineCodes);
             parking['@airlineCodes'] = o.options.attributes.airlineCodes;
         }
-        if(o.options.attributes.number !== undefined && o.options.attributes.number.trim() !== '') {
+        if(o.options.attributes.number !== undefined && 
+            typeof o.options.attributes.number === 'number' || (
+                typeof o.options.attributes.number === 'string' &&
+                o.options.attributes.number.trim() !== ''
+            )
+            ) {
             console.debug(o.options.attributes.number);
             parking['@number'] = o.options.attributes.number;
         }