Update: This issue has been fixed, now there won’t be such limitation, but only for orders created after 8th August 2018.
due to changes to the Shopify’s API, we will no longer be able to automatically mark as refunded in your database, orders older than 60 days at the moment of the refund notification, but if an order is newer than this limit everything is working OK.
This means that for older purchases, you have to manually mark them as refunded in the app.
We are working on a workaround for this issue.
All other notifications like mark as paid, cancelled and fulfilled are working.