bookingpress_general_settings_add_tab_filter

    add_filter('bookingpress_general_settings_add_tab_filter', 'bookingpress_general_settings_add_tab_filter_func', 10);
    function bookingpress_general_settings_add_tab_filter_fun($bookingpress_file_url)
    {
        //$bookingpress_file_url[] = File URL

        return $bookingpress_file_url;
    }