Manfred S. reported;
System.NullReferenceException: Object reference not set to an instance of an object. at SystemTrayMenu.UserInterface.SettingsForm.SettingsForm_FormClosed(Object sender, FormClosedEventArgs e) at System.Windows.Forms.Form.OnFormClosed(FormClosedEventArgs e) at System.Windows.Forms.Form.CheckCloseDialog(Boolean closingOnly)