WordPress 3.9 has changed the WordPress post editor quite a bit, and integrated TinyMCE 4.0 (the post editor software) directly into the WordPress core. As a result, custom style and shortcode buttons previously in the editor, including the Obox Styles and WooCommerce buttons, no longer appear. Any existing styles and shortcodes in your content will still work and display normally – you just can’t access the quick menus to add these currently. Both Obox and Woo will be adding alternatives to these old functions in upcoming updates.
In the meantime, you may still add WooCommerce shortcodes manually. The below overview includes the code used to achieve the styles.