Hi Robert,
Sorry to hear that – however to clean up you would need to manually remove entries from the database. It may be possible to encapsulate this in a short number of queries rather than dropping table rows one-by-one, however, if you are familiar and comfortable with MySQL.
All traces of Woocommerce were deleted from the database as expected after deleting the plugin from the WP backend.
You could be correct here but just be aware of the possibility that, apart from the default pages that WooCommerce installs, any other entries in the posts table are likely to remain in place.