problem in version 2.8 with currency

Hi,
In the latest release I’ve got a problem with currency.
I use this code in function.php to convert Rial to Toman.

if ( ! function_exists( 'edd_toman_currency' ) ) {
    function edd_toman_currency( $formatted, $currency, $price ) {
        if ( ! is_admin() ) { 
                $price = @str_replace( ',', '', $price );
                $price = @$price / 10; 
                return $price . ' ?????'; 
        }
        return $price . ' ????'; 
    }
}
add_filter( 'edd_rial_currency_filter_after', 'edd_toman_currency', 10, 3 );

but in the latest release it changed from Toman to rial.
and the function code doesn’t work any more.
I also used this plugin but it didn’t work, either.
https://fa.www.ads-software.com/plugins/edd-rial-to-toman/
Is there anyway to fix this?
and I want to say that Toman is more common than Rial in Iran. Please change it to toman in future updates.

Thanks