I'm having these same issues. Most of it seems associated with the "pre" wifi's. How do you get the 740 to forget them over a power cycle? I can disconnect each one and it works, but cycling the power brings back the password memory and they're all back. I would like to take them down before I put the 740 back in the plane and have to redo them every time I start the plane. BTW, I've got the UAvionix UAT in my plane.
Thanks
Bob