Brightpearl base currency must be the same as your ekmPowershop default currency. Order values cannot be converted during the order download. When orders download they automatically take your Brightpearl base currency.
Although ekmPowershop allow you to activate multiple currencies for altering the prices displayed on your website, the order is always formed in the back office using your default currency and the order will always download into Brightpearl with the Brightpearl base currency. Find out how to add multiple currencies to your ekmPowershop store