apolloo, just to be certain, was that a copy of the launcher you had on your computer, or was it the actual file from the SD card? I was thinking if the SD card might've corrupted the file, it wouldn't be seen on a copy of the same file from earlier.
(just to investigate a bit, not defending anything here)
it's the one on my 3DS.
this one:
http://i.imgur.com/EynPYkB.png
is the launcher.DAT that is on my computer,
this one ( that i tested ) :
http://i.imgur.com/cQEziXW.png
is the launcher that i copied directly from my 3DS. see the folder path on the screen shot. the 3DS folder is all my backup data ( including saves, and system NAND backup )
i checked both files the sum are the exact same








