Multi-currency Incompatibility

First of all it is a decent plugin. I use WordPress 4.7.3 and woo-commerce 2.6.14. I found a bug on your plugin. When I set some checkbox on [Product Custom Options]. The currency are not updated as setting. Such as I set a checkbox “Paper package” for 5.99 USD. When buyer use other currencies, they are 5.99 GBP, 5.99 CNY, 5.99 JPY. The addon price doesn’t change according to the exchange rate. It shows the same as a number. Is there anybody else found this? I think you can fix it because this plugin is better than other product addon/option plugins. Also I will translate it into Chinese.