Did you get the notice to replace the existing template?
I don't think there was a notice about changing the existing template - at least I did not see it.
I also looked in the ACP>Customization>Templates and I can see there has been a change from when I first looked in Template>boxDonationBox
Here is how it is now:
$(".donationOutputValueMoneyAmount").text(function () {
return $(this).text().replace(".", ",");
});