WooCommerce 3.4.5 is now available. It is a security release, and you should update asap.
Full information here.
Looking to download WooCommerce version 3.4.5?
You may do so here. Under Development > Advanced View, scroll down, and select version 3.4.5 and click the “Download” button.
This applies to any version of any plugin in the official WordPress repo. Mind blown? Leave a positive comment, below 🙂