This release is compatible with the imminent WooCommerce v2.2, as well as being backwards compatible with the latest stable WooCommerce release (v2.1.x).
A few minor improvements are also included, including the additional of a new subtotal data field for orders.
See the full changelog for details of the other changes in this release.
Update today!
Be sure to update to v1.4 of the WooCommerce Zapier extension before updating to WooCommerce v2.2.
The latest version can be downloaded via your WordPress dashboard, or via the WooThemes.com my account page.