Fixed #278.

src/controller/mainController.py

@@ -656,6 +656,9 @@ class Controller(object):
    sessions.sessions[item].shelve()
   if system == "Windows":
    self.systrayIcon.RemoveIcon()
+   pidpath = os.path.join(os.getenv("temp"), "{}.pid".format(application.name))
+   if os.path.exists(pidpath):
+    os.remove(pidpath)
   widgetUtils.exit_application()
 
  def follow(self, *args, **kwargs):