You can cancel your Little Snitch Mini subscription in the App Store as follows:
- From the Little Snitch Mini menu bar icon, go to Little Snitch Mini Settings > Premium and click Manage Subscriptions.
- The App Store will open and you should see your active Little Snitch Mini subscription. Click the Edit link on the right side of this entry.
- The Edit Subscription window will open and under Options you will find the Cancel Subscription button. Click this to make the cancellation final.