You can try bigbluemenu as well https://drive.google.com/open?id=0B0SacJGiaRDWaFBNSmpHalZlc0U
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No try the bigbluemenu and then install FBI later
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nvm..
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That's the file. Good luck
Also the hs for new 3ds works on any region new 3ds and the hs for old 3ds will only work on the old 3ds models, any region though.
Weird. Formatting is necessary if there's emunand there as well to prevent some conflicts with the 2 nands.
But yea it doesn't hurt to format your system once though especially if you getting bugs