The throttle configuration file is stored in the FlyByWire folder “OUTSIDE” of the community folder. So when you open the Community folder, just navigate one folder upwards. And you should see 3 folders. The Community Folder, the Official Folder, and the FlyByWire folder. Just delete that FlyByWire folder and the throttle config should revert to their default values.
But to be honest, the EFB calibration that they’ve made is device agnostic, meaning it should work for every type of controls that you have. Provided that you understand how it behaves and what it does, so that you can calibrate it properly.