How to change Store "From" email and name
The "From" address and name for your store transactional emails can be changed by going to WooCommerce > Settings > Email. Scrolling down to Email sender options, you will see the two fields.
Changing all email addresses at once
If you are handing off your store to a client or would like to use a completely new email address for everything (like receiving order notifications), you can use a WP-CLI command.
Go to WP-CLI tab and enter this command:
search-replace email@example.com firstname.lastname@example.org
This command replaces all email@example.com entries to firstname.lastname@example.org address.