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It's not a stupid question, but the answer is generally: not in a easy way.
NSFs is just binary programs (like a PC executables) and can store the music in any way, leaving the only possible way to get the data is to run the program and letting it be played.
But, it would be possible to convert if the NSF data is stored in a known format, for example files done with famitracker.
Now I don't think I'm going to support it in the tracker, but at least it's possible if someone needs to recover the FTM from a NSF.
Finally, the easiest way to see how a NSF plays the music is to use NSFplay/NSFplug and look at the keyboard window where you can see notes, volume levels and so on.
If you want any more information about how it happened, I just clicked the save button (I had already saved the file before) and then the program kind of stalled for a second, and then that little windows error box popped up that says [Send] [Don't Send]... Famitracker was completely locked up.
It saved the names of the instruments, the number of the sequence each one used, but any MML data for the instruments was gone. The patterns are empty. I'm guessing something went wrong during the saving of the instrument settings since the process was only half completed.
Sorry for the time it takes, but it's almost done, only the DPCM channel left.
I had to write a tool to extract the NSF data and then I'll have to fill the FTM manually.
It'll probably be done tomorrow.