Hi guys,
I hear the confusion, and since this is a few different issues, I hope this clarifies a few things:
Shapeways is registered as a business in both the US and the EU, and not in the UK, so we can only offer Euros and Dollars (and not Pounds Sterling)
Our website is in US Dollars, and we convert to Euros. We have always updated the conversion rate manually once a month (on the 1st). We do this unless the currency jumps dramatically, then we update it more often to be accurate.
The price you see is determined by your shipping address. You can not manually change it, sorry.
Currency is determined by SHIPPING address - so in your cart, when you choose your shipping country it will switch between Euros/Dollars - this is a way to see what it costs in each currency should you wish to do so.
Remember you can't have different billing and shipping addresses - they must be in the same country, so it is possible you get to the checkout page in the 'wrong' currency, but you wont be able to checkout if your billing and shipping addresses do not match.
Best,
Natalia