You learn something every day. Where you learn it from is a different matter.
I mentioned my issue with looking up serial numbers while doing Nikon software updates in a previous story. Turns out there is a way to keep those handy while you're traveling: register them in your Nikon online account. Yep, the same way you register camera and lens serial numbers with Nikon online, you can register software serial numbers.
Now why no one at Nikon thought to mention that to me after I wrote what I did I can't say. It turns out that one reader of this site had stumbled upon that possibility and started using it. Basically, Nikon doesn't seem to publicize this anywhere that I can find (I'd be happy to stand corrected).
But why the heck don't they just automate this? When you install, give the user the option of adding the software license number to their Nikon account registry ("Would you like to register your license number with your Nikon account so that it's available to you in a convenient fashion when you update software?"). Plus, when you create an update just give the user the option of filling in the serial number from their Nikon account.
Solve user problems, don't create them.