Old Website to WooCommerce orders import

So I have imported all of the orders into our new wordpress site (using WooCommerce), however, in looking through our user accounts, none of the pre-WooCommerce orders have been granted access to the virtual, downloadable items. New, post-WooCommerce orders are given access to the files.

The only way I’ve seen to give access to the older orders is by ‘granting’ them access at the bottom of the order #.

However, I’d really rather not go through 100k+ orders and grant access manually. Any shortcuts to this?