The WooCommerce Price Based on Country 1.6.12 fix release is now available. You can download it on WordPress.org or as an automatic update in your administration panel.
The full changelog for 1.6.12 is below.
* Fixed: Wrong subtotal calculation with price by exchange rates and more of 10 items in cart.
* Fixed: Break styles on variations downloadable products.
* Fixed: Bug on coupons with PHP 7
* Fixed: Deprecated WooCommerce functions and backward compatibility to 2.6
* Added: Code improvements.
* Added: Integration with Pro Addon.