Hi Steve,
Thanks for letting us know. Also feel free to raise a direct helpdesk ticket with us if you haven't already (details are in your download pack).
I suspect it's because of the country code. EU is not a valid country code. EU is a region, not a country, so that won't work. The plugin definitely works -- we have several other clients using it, we use it for our own projects, and for our demo stores as well. But of course we can help you get set up if it's not working as yet.
First step would be to populate the correct country codes. Try DE for German and UK for the UK. We also have a full list of country codes over here if you want to copy and adjust: https://shopifyninjas.zendesk.com/entries/53547574-Do-you-have-a-list-of-all-the-country-codes-
Again, feel free to contact us directly as well.
Thanks!
Tristan.