You can set the currency in the Shopify admin.
Click General.
In the Store currency section, click Change formatting.
In each of the fields, replace {{amount}} with the currency format that you want to use from the options table.
Click Save.
The unit of measure can also be set in the admin.
In addition to this the app now has options in the pricing tab for currency conversion, and in the content tab to convert measurements to metric!
You can use a fixed conversion rate to essentially set your own conversion, or you can have us convert the currency live using the convert to currency setting.