finlabsindia/wp-content/themes/vamtam-consulting/vamtam/helpers/migrations.php

<?php

// new Mega Menu options for the mobile menu font

if ( get_option( 'vamtam_megamenu_default_theme_transition', 0 ) === 0 ) {
	$themes = get_option( 'megamenu_themes' );

	if ( isset( $themes['default'] ) ) {
		$themes['default']['mobile_menu_item_link_text_align'] = 'left';
		$themes['default']['mobile_menu_item_link_font_size'] = '26px';

		update_option( 'megamenu_themes', $themes );
	}

	update_option( 'vamtam_megamenu_default_theme_transition', 1 );
}