If you find that WooCommerce is suddenly gone from your website just after an update to WooCommerce, and you’ve ruled out hacking or any other possibilities, try this quick fix:
- Log in to WordPress and go to Plugins -> Add New
- Search for WooCommerce
- When WooCommerce appears within the search results, click Install Now, next to its name
- After the plugin has installed, choose to activate the plugin immediately
Your WooCommerce website should now be working normally again.