Index: DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs
===================================================================
diff -u -r6220 -r6243
--- DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs	(.../DamPlugin.cs)	(revision 6220)
+++ DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs	(.../DamPlugin.cs)	(revision 6243)
@@ -656,7 +656,7 @@
             BindSupport.Bind<DamPlugin>(panel, surfacelineExportItem, x => x.ExecuteSurfacelinesExport());
             BindSupport.Bind<DamPlugin>(panel, clearResultsMenuItem, x => x.ClearResults());
             BindSupport.Bind<DamPlugin>(panel, showCalculationOptionsItem, dp => dp.ShowCalculationOptions());
-            BindSupport.Bind<DamPlugin>(panel, manualItem, dp => dp.GetUserManual());
+            BindSupport.Bind<DamPlugin>(panel, manualItem, dp => GetUserManual());
 
             BindSupport.Bind<DamProjectData>(projectPanel, projectTypeBarItem, x => x.DamProjectType, BindingType.LabelAndValue);
             BindSupport.Bind<DamProjectCalculationSpecification>(calculationSpecificationPanel, designAnalysisBarItem, x => DamProjectCalculationSpecification.SelectedAnalysisType, BindingType.LabelAndValue);
@@ -669,12 +669,14 @@
         /// <summary>
         /// Gets the user manual.
         /// </summary>
-        private void GetUserManual()
+        private static void GetUserManual()
         {
-            // As documented by https://support.microsoft.com/en-gb/help/305703/how-to-start-the-default-internet-browser-programmatically-by-using-vi
             try
             {
-                Process.Start(Resources.DamUserManual);
+                using var p = new Process();
+                p.StartInfo.FileName = Resources.DamUserManual;
+                p.StartInfo.UseShellExecute = true;
+                p.Start();
             }
             catch (Win32Exception noBrowser)
             {
@@ -683,9 +685,9 @@
                     MessageBox.Show(noBrowser.Message);
                 }
             }
-            catch (Exception other)
+            catch (Exception error)
             {
-                MessageBox.Show(other.Message);
+                MessageBox.Show(error.Message);
             }
         }