Paul,
Open up d/b explorer/Aircraft. Go to the top one N998HG, scroll along to CO field, click on it, then edit cell, the blue box changes to white, enter *, click on one of the pink boxes.
Scroll along to autoupdate, click on the Y, then edit cell. blue changes to white, change the Y to N then click on one of the pink boxes, close d/b explorer.
File/Exit to close down RB.
Restart and check the CO field on N998HG and what is in it.
Alan