For the icon, I've tried it all, pressing it once then waiting at least 10 sec, pressing it twice, opening them via menu and closing (perhaps) via icon ... I don't know. I own 3 other planes using the Gizmo ( TBM 900, BN-2 and CL 650, but only CL 650 is currently installed as it is the sole one that support XP12 yet ) perhaps there is a conflict between CL 650 and MU-2 Gizmo ?
Problem solved for the ghost throttle ! I didn't understand the option was here for that, thanks!