I downloaded the Birthday eMailer app in mid-2014 so that we can send birthday emails to our customers. This year we wanted to refresh the look of the email that we send out so we created another template with a new look. I can't seem to figure out how to replace the previous template with the new template as the app's default template, though. Would someone be able to help with this?
I assume you're talking about this app: https://appexchange.salesforce.com/listingDetail?listingId=a0N30000003I77zEAC
It mentions that it is using Email Templates. Please have a look at the following page of the Salesforce documentation and let us know if you can find the Email Template to edit: https://help.salesforce.com/HTViewHelpDoc?id=admin_emailtemplates.htm&language=en_US