Delete a backup
Delete an online backup from Louxi's Luna Chart Cloud, using the four details from the keep-this-safe card: name, question, answer and passphrase. It's deleted for good, straight away, with every share made from that chart's devices left as it is (stop those in the app, or see below). No PIN is needed.
You can also do it in the Cloud app: Settings > BACK UP ONLINE > DELETE ONLINE, and stop a partner share with Settings > SHARING > CHANGE > STOP SHARING. More about what's kept and deleted is on the privacy page.