Regenerate Download Permissions in bulk

Hi there,

I run an e-commerce site and I’m in trouble.
I sell digital products and, when updating to Woocommerce 3 my Amazon S3 plugin didn’t work and it messed up things a little bit.
All the products that contained .exe and .dmg extensions were not allowed, and therefore the download files were automatically deleted.

Long story short, now I have thousands of customers without download permissions. They have to e-mail me saying “why there aren’t any downloads?”, then I manually go to their order and regenerate the permissions.

I could go order by order (70,000 of them) and regenerate the permissions, but I think there should be an easy way!

I haven’t been able to find any feature in Woocommerce, any plugin or any answer on forums that does this, can anybody help?