When I switch languages currency does not change – with Extra product plugin

I have the plugin extra product on my website and I used it on my single page product – I install multi currency, the first time it worked but now it does not – When I switch languages to English the only prices that are shown are those in euros and my parameters are correct (see images)- So event if I do not put the price in euro and put the price in dollars (in the extra product formulaire) it does show an empty price on the product page because by default it take the price in euros. Can you help please thks –