AirPort Utility Password Reset
AirPort Utility Password Reset
AirPort Utility Password Reset
AirPort Utility does not have a password requirement, but If you are trying to access the settings on an Apple AirPort router, then you need to enter the password for the AirPort base station product.
If you have forgotten the password for your AirPort base station, you can perform a Soft Reset following the instructions in the support document that you referenced in your post.
How to reset your AirPort base station
If you are still having difficulty, perhaps you could provide a few more details on what it is that you are having problems with, so could provide more assistance.
Please assume that we cannot see your network.....(we can't)......or know what you are seeing......(we can't).......so we will only know as much about your problem as you can tell us.
The support article you came here from should provide you with the steps needed to try to resolve this issue. Have you tried them all yet? If so, and they didn't help, I suggest that you contact Apple Support directly. To do so, simply select the "Get Support" link in the upper right-hand side of this forum's web page.
AirPort Utility Password Reset