FOX - WooCommerce Currency Switcher Professional

Plugin URL: https://woocommerce.com/products/product-dynamic-pricing-and-discounts/

Into file addify-product-dynamic-pricing-and-discounts\front\class-af-product-discount-front.php add next code:

if (class_exists('WOOCS')) {
    global $WOOCS;
    if ($WOOCS->is_multiple_allowed) {
        $currrent = $WOOCS->current_currency;
        if ($currrent != $WOOCS->default_currency) {
            $currencies = $WOOCS->get_currencies();
            $rate = $currencies[$currrent]['rate'];
            $product_price_in_cart_calc = $product_price_in_cart_calc / $rate;
        }
    }
}