Prior to updating the WooCommerce plugin by WooThemes, users should test the update in a local or development environment. You should also read the documentation about the update because the taxonomy for WooCommerce pages has changed to end points. The idea of plugin defined endpoints opposed to designated user defined pages may seem off putting but the concept is quite easy to follow. If you are planning to update to WooCommerce 2.1.3 you need to understand the changes. Do Not Skip reading the documentation.
It’ important that you know what is going to happen when you take the update and get be prepared for the work that lies ahead. For example, menu items linked to the user defined WooCommerce pages will need to be redefined in the WooCommerce settings panel, as well as, in the site navigation menu(s). Menu items are going to break and being prepared for that fact will take some of the stress out of the process.
When you are ready to update, the first thing they should do is backup the site. If you do not feel comfortable or do not know how to backup your database, Online Backup by Jason Woods @ Backup Technology is a great free solution. If anything were to go wrong with the WooCommerce update there will be a pre-catastrophe copy of the site. Do not skip the backup, it is always better to be safe than sorry. As a rule of thumb, site managers should schedule backups frequently.
If you updated the plugin prior to reading the documentation stop everything and go read the documentation. After you read the documentation make the necessary changes to your menus and you should be good to go. If for any reason the update went wrong try deactivating, deleting and reinstalling the plugin from scratch. If reinstalling doesn’t solve your problem and you didn’t backup your site, visit the plugin’s GitHub Repository->Releases to download the previous WooCommerce version.