I wouldn't worry about it, Gateway will release an update shortly in a week or so. Just keep pressing no, just be glad this isn't sysnand.
I wish it was sysnand. That is easy, I formatted sysnand a dozen times from from doing this. Sysnand is blank for me so it is simply a matter of entering the setup info. I kept forgetting about the recovery mode trick.
This is NOT guaranteed. Nintendo changed encryption again so it re-hashes everytime the console boots. Not easily worked around since it directly affects emuNAND.
Thor, I would recommend restoring your emuNAND partition to a backup and then blocking Nity update servers in your router.
If another solution doesn't present itself I will likely do that, need to learn SDF anyway. My 9.5 emunand backups are all from freshly formatted versions so they don't have any data. This isn't just one console it is all three of them.

I have my boys trained well as they had the sysnand nag on the o3DS for who knows how long and never messed up and the stakes are a lot lower on emunand.
From my understanding Nintendo got us good with this update although we all knew it was coming. Guessing when GW is going to fix it is a fools game but is suspect it is going to take some time and it won't be Soon™.