Convert currency before donation

Is the "Convert currency before donation" configuration option supposed to do a currency conversion using market rates or something? When I set it, all it seems to do is to change the currency indicator. For example, when I have a donation of 7000 MXN, it changes it to 7000 USD.

I can't find the configuration option in the documentation.

Andy

Hi Andy,
You can register a free API Currency converter through this page: free.currencyconverterapi.com/free-api-key
And then, you can open file: root -> components -> com_jdonation -> helper -> helper.php
Find:
98bea5b83490f12e5be0
and change your API Key. After that, you can test the currency converter function
Thanks
Dam