Hi David,
I have tried your steps to clear everything, without success. The currency is set as Canadian Dollar ($) in store settings and we are still getting the Euro currency in printed invoice.
There is one thing to note about our installation. We are running the store with a fr-FR language pack. The default currency for this culture is Euro.
I wanted to try running under en-US, but I have encountered another issue with the module that is problematic to us. When adding the BuyNow module using the "add existing module", the added module behaves as a completely new module, without any setting and data. This is not what I expected and does not seem to allow to have more than 1 product listing using a single page. Am I missing something here?
Thanks