the plugin doesnt convert the global product addons into the requested currency

we have some issue with your plugin, on our site we have some additional attributes to our products using the global product addons plugin:

https://edwards43.sg-host.com/product/uniq-black-gold-black-buffalo/

1. when we select some of these options you see it adds euros when you select hardware, a engraving or accessories. now if we change to lets say dollar this amount will change into dollars so 500 euros becomes 500 dollars or even worse 500 Indian rupees it also needs to calculate this amount else our pricing will be wrong.

2. we don’t like the way the currency selector looks so would it also be possible to get the selector as a simple dropdown menu in our main menu bar like our language switcher?

3. or will it be possible to add it to our language selector so if somebody picks their country it will automatically switch to the currency selected?

4. also would it be possible to add the selector you see next to our price on the product page: https://edwards43.sg-host.com/product/uniq-black-gold-black-buffalo/
but at the cart and checkout page as well so you can also change the currency in these pages.