Only touch power settings if the user checks the box. But always disable the changes back to the defaults when the user unchecks it.

app/Extra.cs

@@ -475,7 +475,16 @@ namespace GHelper
         {
             AppConfig.Set("toggle_clamshell_mode", checkAutoToggleClamshellMode.Checked ? 1 : 0);
             ClamshellModeControl ctrl = new ClamshellModeControl();
-            ctrl.ToggleLidAction();
+
+            if (checkAutoToggleClamshellMode.Checked)
+            {
+                ctrl.ToggleLidAction();
+            }
+            else
+            {
+                ClamshellModeControl.DisableClamshellMode();
+            }
+
         }
     }
 }

app/Helpers/ClamshellModeControl.cs

@@ -46,17 +46,31 @@ namespace GHelper.Helpers
 
         public void ToggleLidAction()
         {
-            if (IsInClamshellMode() && IsClamshellEnabled())
+            if (!IsClamshellEnabled())
             {
-                PowerNative.SetLidAction(0, true);
+                return;
-                Logger.WriteLine("Engaging Clamshell Mode");
+            }
+
+            if (IsInClamshellMode())
+            {
+                EnableClamshellMode();
             }
             else
             {
-                PowerNative.SetLidAction(1, true);
+                DisableClamshellMode();
-                Logger.WriteLine("Disengaging Clamshell Mode");
             }
         }
+        public static void DisableClamshellMode()
+        {
+            PowerNative.SetLidAction(1, true);
+            Logger.WriteLine("Disengaging Clamshell Mode");
+        }
+
+        public static void EnableClamshellMode()
+        {
+            PowerNative.SetLidAction(0, true);
+            Logger.WriteLine("Engaging Clamshell Mode");
+        }
 
         public void UnregisterDisplayEvents()
         {