If for some reason you need to return the add-on to the default settings you can delete all data from the internal storage and reload the extension.
Under the menu Settings select Reset and click the WIPE OUT AD RESET button.
This will delete any data in the extension storage, and reload the extension.
In case of problems with accessing the extensions settings you can also clear the storage at the browser's menu More tools - Remote Debugging - This Firefox.
Find AVD in the list, select Inspect to the right, switch to Storage tab, expand Extension Storage, right click on extension UUID and select Delete all.
If you still encountering any issues after this operation please contact to our support.