I hacked my N3DS from a very old version of the guide, back when you still had to downgrade to 2.0 and going all the way to A9LH was a 100 step process that took several hours.
I have updated most of my hacks long ago by now, B9S and all that, but one thing that I never touched was the Health and Safety app. The guide had my install FBI in it's place, and I did. But now that this method is so outdated, and the version installed itself is outdated, I have been trying to revert this. Considering that I have B9S, and several NAND backups, and that modifying this app should not really touch any sensitive areas, I figured it wouldn't hurt to try.
I tried that NUS downloader to get the original hs.app, but couldn't get it to work, so I dug through my old backup and temp files I used when I first hacked my N3DS long ago and found the original hs.app I had made a backup of, and tried using Decrypt9's feature to inject into the H&S app to restore it, and it MOSTLY worked... but not completely.
My 3DS itself is still fine mind you, not bricked, official apps and homebrew still run fine, can connect online and all that, it's just that attempting to restore the original H&S app didn't fully work. When I navigate to the icon, it still shows the FBI icon on the lower screen... however, highlighting it shows the Health and Safety logo on the top screen instead of the FBI logo, and starting it starts the Health and Safety app... so only the icon on the bottom screen didn't work for some reason. Any suggestions what I can try to fix this?