Multi-currency Incompatibility

Well it is good plugin because it is easy to use. It is simple and it is enough for me. I use WordPress 4.7.3 and woo-commerce 2.6.14. I found a bug on your plugin. When I set an input on [Custom Options] tab. The currency are not updated as setting. Such as I set an input 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.