I had a strange behavior after upgrading to new Firmware - bug or feature ?
While the User key was still the same, neither the old Admin key nor the factory default for Admin was working any longer.
And you guess it right: within seconds the 3 tries are gone ......
[ all under macOS 10.12.4, Nitro App 1.0 ]
==> So is that a feature and what will be the Admin password then ? Or just strange
Solution : Again I pull up the Ubuntu VM and tried to reset the NK Storage Key.
GnuPG 2.1 as gpg2 --card-edit ==> admin ==> factory-reset started, but finished with an error
GnuPG 2.0 as gpg-connect-agent <nitrokey-reset.txt worked well and rested Admin and User try-counter and PW to Factory Defaults
Hint: The Firmware Password is NOT reset ! Just in case one thinks so ....