FOX - WooCommerce Currency Switcher Professional

Plugin link: https://yithemes.com/themes/plugins/yith-woocommerce-name-your-price/

• in file functions.php of your current wp theme add next code:

  add_filter('ywcnp_get_suggest_price', 'woocs_ywcnp_convert_price', 9999, 2);
  add_filter('ywcnp_get_min_price', 'woocs_ywcnp_convert_price', 9999, 2);
  add_filter('ywcnp_get_max_price', 'woocs_ywcnp_convert_price', 9999, 2);
  add_filter('ywcnp_add_cart_item_data', 'woocs_ywcnp_add_cart_item_data', 9999, 2);
  
  function woocs_ywcnp_add_cart_item_data($data, $prod) {
      $price = $data['ywcnp_amount'];
      if (class_exists('WOOCS')) {
          global $WOOCS;
          if ($WOOCS->current_currency != $WOOCS->default_currency) {
              $currencies = $WOOCS->get_currencies();
              $price = $price / $currencies[$WOOCS->current_currency]['rate'];
              $data['ywcnp_amount'] = $price;
          }
      }
      return $data;
  }
  
  function woocs_ywcnp_convert_price($price, $prod) {
      if (class_exists('WOOCS')) {
          global $WOOCS;
          if ($WOOCS->is_multiple_allowed) {
              $price = $WOOCS->woocs_exchange_value($price);
          }
      }return $price;
  }

• also to the same file functions.php add next code:

  add_filter('ywcnp_amount_cart_html', function ($amount) {
      if (class_exists('WOOCS')) {
          global $WOOCS;
          $amount = $WOOCS->woocs_exchange_value(floatval($amount));
      }
      return $amount;
  }, 9999, 1);
  

  open file \wp-content\plugins\woocommerce-currency-switcher\js\front.js   and comment there row of code as on the screen: