diff --git a/DS4Windows/Program.cs b/DS4Windows/Program.cs
index 61bd3e8..174a204 100644
--- a/DS4Windows/Program.cs
+++ b/DS4Windows/Program.cs
@@ -15,15 +15,14 @@ namespace DS4Windows
         [return: MarshalAs(UnmanagedType.Bool)]
         static extern bool SetForegroundWindow(IntPtr hWnd);
 
-        [DllImport("user32.dll")]
-        private static extern IntPtr GetForegroundWindow();
         // Add "global\" in front of the EventName, then only one instance is allowed on the
         // whole system, including other users. But the application can not be brought
         // into view, of course. 
-        private static String SingleAppComEventName = "{a52b5b20-d9ee-4f32-8518-307fa14aa0c6}";
-        static Mutex mutex = new Mutex(true, "{FI329DM2-DS4W-J2K2-HYES-92H21B3WJARG}");
+        private static string SingleAppComEventName = "{a52b5b20-d9ee-4f32-8518-307fa14aa0c6}";
+        //static Mutex mutex = new Mutex(true, "{FI329DM2-DS4W-J2K2-HYES-92H21B3WJARG}");
         private static BackgroundWorker singleAppComThread = null;
         private static EventWaitHandle threadComEvent = null;
+        private static bool exitComThread = false;
         public static ControlService rootHub;
 
         /// <summary>
@@ -77,7 +76,8 @@ namespace DS4Windows
 
             try
             {
-                Process.GetCurrentProcess().PriorityClass = System.Diagnostics.ProcessPriorityClass.High;
+                Process.GetCurrentProcess().PriorityClass = 
+                    ProcessPriorityClass.High;
             }
             catch
             {
@@ -95,8 +95,8 @@ namespace DS4Windows
             catch { /* don't care about errors */     }
 
             // Create the Event handle
-            threadComEvent = new EventWaitHandle(false, EventResetMode.AutoReset, SingleAppComEventName);
-            //CreateInterAppComThread();
+            threadComEvent = new EventWaitHandle(false, EventResetMode.ManualReset, SingleAppComEventName);
+            CreateInterAppComThread();
 
             //if (mutex.WaitOne(TimeSpan.Zero, true))
             //{
@@ -104,24 +104,23 @@ namespace DS4Windows
                 Application.EnableVisualStyles();
                 Application.SetCompatibleTextRenderingDefault(false);
                 Application.Run(new DS4Form(args));
-                //mutex.ReleaseMutex();
+            //mutex.ReleaseMutex();
             //}
 
-            // End the communication thread.
-            //singleAppComThread.CancelAsync();
-            //threadComEvent.Set();  // signal the other instance.
-            //while (singleAppComThread.IsBusy)
-            //    Thread.Sleep(50);
+            exitComThread = true;
+            threadComEvent.Set();  // signal the other instance.
+            while (singleAppComThread.IsBusy)
+                Thread.Sleep(50);
             threadComEvent.Close();
         }
 
         static private void CreateInterAppComThread()
         {
             singleAppComThread = new BackgroundWorker();
-            singleAppComThread.WorkerReportsProgress = false;
-            singleAppComThread.WorkerSupportsCancellation = true;
+            //singleAppComThread.WorkerReportsProgress = false;
+            //singleAppComThread.WorkerSupportsCancellation = true;
             singleAppComThread.DoWork += new DoWorkEventHandler(singleAppComThread_DoWork);
-            //singleAppComThread.RunWorkerAsync();
+            singleAppComThread.RunWorkerAsync();
         }
 
         static private void singleAppComThread_DoWork(object sender, DoWorkEventArgs e)
@@ -130,15 +129,16 @@ namespace DS4Windows
             WaitHandle[] waitHandles = new WaitHandle[] { threadComEvent };
             Thread.CurrentThread.Priority = ThreadPriority.Lowest;
 
-            while (!worker.CancellationPending)
+            while (!exitComThread)
             {
                 // check every second for a signal.
                 if (WaitHandle.WaitAny(waitHandles) == 0)
                 {
+                    threadComEvent.Reset();
                     // The user tried to start another instance. We can't allow that, 
                     // so bring the other instance back into view and enable that one. 
                     // That form is created in another thread, so we need some thread sync magic.
-                    if (!worker.CancellationPending && Application.OpenForms.Count > 0)
+                    if (!exitComThread && Application.OpenForms.Count > 0)
                     {
                         Form mainForm = Application.OpenForms[0];
                         mainForm.Invoke(new SetFormVisableDelegate(ThreadFormVisable), mainForm);