Marketpress: Customise default country when Multiple Target Countries selected

My client uses Marketpress to sell to the United States and Canada and restricts Marketpress using Choose Target Countries.

The problem is her primary market is the United States - and this is where the store is located. Unfortunately when she chooses these two Target Countries - because the listing is Alphabetical, Canada appears as the default country rather than the United States.

She would love a way to be able to set the default country so that the site defaults to the US in the address line rather than Canada.