clarified help for export template

droid-help/src/main/resources/Web pages/Exporting profiles.html

@@ -308,10 +308,11 @@ <h2>
       <img src="../Images/Export dialog template.png">
     </p>
     <p>
-      An export template is a simple text file which defines customisations of columns to be exported.
-      Using a template, you can customise headers for the data columns, add new columns to the export,
-      convert the data in a column to be uppercase / lowercase and change the order in which columns
-      appear in the export. An example template is shown below:
+      An export template is a simple text file, with a .template extension, which defines customisations of
+      columns to be exported. Using a template, you can customise headers for the data columns, add new columns
+      to the export, convert the data in a column to be uppercase / lowercase and change the order in which columns
+      appear in the export. You can make an export template available to Droid by copying it into the
+      ".droid6\export_templates" folder. An example template is shown below:
     </p>
     <p>
       <pre>