Change the delimiter used when generating CSV files with the Export Bookings for Restaurant Reservations plugin.

custom-csv-delimiter-for-ebfrtb.php

<?php
/**
 * Plugin Name: Custom CSV Delimiter for Bookings Exports
 * Plugin URI: http://themeofthecrop.com
 * Description: Change the delimiter used when generating CSV files with the Export Bookings for Restaurant Reservations plugin.
 * Version: 0.0.1
 * Author: Theme of the Crop
 * Author URI: http://themeofthecrop.com
 * License:     GNU General Public License v2.0 or later
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write
 * to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */
if ( ! defined( 'ABSPATH' ) )
	exit;

/**
 * Changes the delimiter used when generating CSV exports from the
 * default (,) to a semicolon (;).
 */
function ccsvd_custom_csv_delimiter( $delimiter ) {
	return ';';
}
add_filter( 'ebfrtb_export_csv_delimiter', 'ccsvd_custom_csv_delimiter' );