how do you get 15mm adaptors out of a front hub. I need to replace it with a 9mm.

Anyone help?

OK, I've just been through an exercise to instsll said 15QR adapters (on Pro3 hubs). So if this helps – they just pushed (very easily) in on each side. No retaining clips, no screwing in, just slid in nicely.
So in theory you should just be able to pull them out by pulling them off one at a time by maybe using something inserted into the adapter and tug.
Also – do you have 'official' Pro3 std QR adapters – the ones i took out actually screw together once inserted.

Don't have my wheels handy but happy to do pics on Mon night if you've still got problems.

XC3- Very gently tap them through with a drift like you would headset cups.

AM4- Pull on them, hard! (There is an o-ring in these)