Hi Laurent -
I see that my Support colleagues have also replied to you. For posterity here for the group, we recommend Mode 2 for AirTurn BT200 models. In that mode, your AirTurn will send arrow keystrokes to Go Button. These keystrokes can be mapped to any Go Button action using a profile in the in-app "Configure Remote Control" screen.
Each profile maps a set of remote control commands to Go Button actions. You can start with one of the built-in profiles, or you can create a new profile. You can manually add commands, or a much easier way is to press a button or pedal on your remote. The corresponding command will light up in the profile editor screen, adding it to the screen if needed. Then you can tap on the command to select the Go Button action you want that command to perform.
You can read more about this in the Go Button Documentation here:
Brent