FOX - Currency Switcher Professional for WooCommerce

Plugin link: https://codecanyon.net/item/subscriptio-woocommerce-subscriptions/8754068

//in your wp theme functions.php file add next code
add_filter('wcml_raw_price_amount', 'woocs_convert_fix_price');

function woocs_convert_fix_price($price) {
    if (class_exists('WOOCS')) {
        global $WOOCS;
        $price = $WOOCS->woocs_exchange_value($price);
    }

    return $price;
}