problem with fancy product designer plugin

Hi the CURCY plugin works great in my store but now I am using a new plugin called fancy product designer which is used to customize the products in my store. I have a problem because when I add the customized products to my cart the prices are multiplied increasing the price of the product a lot.

I found a PHP code from WOOCS WooCommerce Currency Switcher plugin, which apparently is to solve this problem.

I would like to know if I can get something similar to solve this integration problem.

https://currency-switcher.com/fancy-product-designer

This problem does not appear if I am logged into my site as administrator and I make the purchase in USD, it only appears to customers who buy in other currencies including dollars.

I share with you a link to login to my site as administrator and I also share a link where you can see the products that have this problem.

https://karbono.com.mx/product/case-personalizado-iphone-6/

Thank you very much for your help!