Returns the settings associated with this application for all users.
        
        :return     <projexui.xsettings.XSettings>

def systemSettings(self):
        """
        Returns the settings associated with this application for all users.
        
        :return     <projexui.xsettings.XSettings>
        """
        if not self._systemSettings:
            if self.isCompiled():
                settings = QtCore.QSettings(XSettings.IniFormat,
                                            XSettings.SystemScope,
                                            self.organizationName(),
                                            self.applicationName())
                rootpath = os.path.dirname(settings.fileName())
            else:
                rootpath = os.path.abspath('.')

            name = self.applicationName()
            filename = os.path.join(rootpath, '{0}.yaml'.format(name))

            self._systemSettings = XSettings(XSettings.YamlFormat,
                                             XSettings.SystemScope,
                                             self.organizationName(),
                                             self.applicationName(),
                                             filename=filename)

        return self._systemSettings