Trying to set up and trading in the UK. Customers are all in the USA so only need to use $USD nor GBP.
When I go to change the currency in payment settings no option to change currency only an option to change bank account.
If you want to change the currency, that can be done under Settings > General in your Dashboard. The Standards & Formats area lets you change the currency accepted by default as well as the default weight system used.
Hope that helps!