private void actionCB_DropDownClosed(object sender, EventArgs e)
        {
            switch (actionCB.Text)
            {
            case "Delete":
                destDirLBL.Visibility    = Visibility.Collapsed;
                destTB.Visibility        = Visibility.Collapsed;
                destBrowseBTN.Visibility = Visibility.Collapsed;
                break;

            default:
                if (actionCB.Text == "Dropbox Cleanup")
                {
                    sourceTB.Text = ScanHelper.DefaultDropboxPath();
                }
                destDirLBL.Visibility    = Visibility.Visible;
                destTB.Visibility        = Visibility.Visible;
                destBrowseBTN.Visibility = Visibility.Visible;
                break;
            }
        }