After you have logged in to Explain Everything Discover tap on your username on the right side of the top menu. Head to the Sponsored Accounts section where you will see the number of seats available.
Press the Edit button in the top right corner of the section. A list of Sponsored Accounts bound to your account will appear. To remove a user, press the red cross (X) next to his or her name. You will be asked to confirm this action.
If you’ve deployed the licenses through MDM, in order to reset the seats assigned to your Group Account, please log in to the Discover Portal and go to the My Account section. After that, please tap on the Edit button in the Group Account section and click on the X button to clear the licenses deployed to the devices.
Please note that the licenses deployed via MDM are linked to your Group Account with the first launch of Explain Everything on those devices. If you want to revoke the licenses, please reset the seats with the instruction above.