Official comment
The subscription you signed up for is a recurring monthly or annual payment for access to our apps and services. At any time you could have downgraded it back to Free to stop any further payments. This was all agreed to at the time of your initial payment.
You can read about how to downgrade your account here:
https://support.dronesmadeeasy.com/hc/en-us/articles/4416438485268-Subscription-Management