You can read a little more about it: here.

If you are a paying user, your billing has already been cancelled. And if you're paid up for the year or current month, I'm issuing prorated refunds. Look for an email from Stripe.com in the next handful of days.

If you have any questions or concerns, please email me at: nate.kontny@gmail.com

And here's a link to export all your documents.