diff --git a/kcc.py b/kcc.py
index ea8fe68..74a02e6 100644
--- a/kcc.py
+++ b/kcc.py
@@ -87,8 +87,7 @@ class QApplicationMessaging(QtWidgets.QApplication):
             self._running = True
         else:
             self._running = False
-            if not self._memory.create(1):
-                raise RuntimeError(self._memory.errorString().toLocal8Bit().data())
+            self._memory.create(1)
         self._key = 'KCC'
         self._timeout = 1000
         self._server = QtNetwork.QLocalServer(self)
@@ -96,6 +95,10 @@ class QApplicationMessaging(QtWidgets.QApplication):
             self._server.newConnection.connect(self.handleMessage)
             self._server.listen(self._key)
 
+    def __del__(self):
+        if self._memory.isAttached():
+            self._memory.detach()
+
     def isRunning(self):
         return self._running
 
@@ -137,13 +140,8 @@ if __name__ == "__main__":
             KCCAplication.sendMessage(sys.argv[1])
             sys.exit(0)
         else:
-            messageBox = QtWidgets.QMessageBox()
-            icon = QtGui.QIcon()
-            icon.addPixmap(QtGui.QPixmap(':/Icon/icons/comic2ebook.png'), QtGui.QIcon.Normal, QtGui.QIcon.Off)
-            messageBox.setWindowIcon(icon)
-            QtWidgets.QMessageBox.critical(messageBox, 'KCC - Error', 'KCC is already running!',
-                                           QtWidgets.QMessageBox.Ok)
-            sys.exit(1)
+            KCCAplication.sendMessage('ARISE')
+            sys.exit(0)
     KCCWindow = QMainWindowKCC()
     KCCUI = KCC_gui.KCCGUI(KCCAplication, KCCWindow)
     if len(sys.argv) > 1:
diff --git a/kcc/KCC_gui.py b/kcc/KCC_gui.py
index bc72681..03618af 100644
--- a/kcc/KCC_gui.py
+++ b/kcc/KCC_gui.py
@@ -945,7 +945,8 @@ class KCCGUI(KCC_ui.Ui_KCC):
     def handleMessage(self, message):
         MW.raise_()
         MW.activateWindow()
-        if not self.conversionAlive:
+        message = message.decode('UTF-8')
+        if not self.conversionAlive and message != 'ARISE':
             if self.needClean:
                 self.needClean = False
                 GUI.JobList.clear()
diff --git a/kcc/comic2ebook.py b/kcc/comic2ebook.py
index ff9199d..d3d45e7 100755
--- a/kcc/comic2ebook.py
+++ b/kcc/comic2ebook.py
@@ -1079,4 +1079,4 @@ def checkOptions():
                       (int(X*1.5), int(Y*1.5)))
         image.ProfileData.Profiles["Custom"] = newProfile
         options.profile = "Custom"
-        options.profileData = image.ProfileData.Profiles[options.profile]
\ No newline at end of file
+    options.profileData = image.ProfileData.Profiles[options.profile]
\ No newline at end of file