Is there a way to make RyanAir shows EURO fare instead of the DCCed USD?

I remember seeing it shows Euro just a day before on an FCO to CTA oneway ticket. Now all it gives me is the 5% padded USD price even I have deleted all cookies in the firefox browser.

At the payment screen its question of "are you sure you dont want to use RyanAir guaranteed currency conversion rate" is meaningless because the fare is already converted from Euro to USD! I think I need to make it show Euro in order to avoid being scammed.