"The latest version as well as a good tutorial can be found here. (this links to latest version, with Steveice's changes)
Changes has been made by Steveice so that nobody shoud experience a full brick again (i.e. the 3DS doesn't boot, even in safe mode). Thus, this version should be almost brick-proof.
Menuhax users will have to remove their extdata folders 00000082 (JAP), 0000008f (US), 00000098 (EUR), after downgrading.
By the way, I've deleted my sysUpdater fork repo on purpose."
reddit link: https://www.reddit.com/r/3dshacks/comments/3zl47b/please_use_the_latest_version_of_sysupdater/
Changes has been made by Steveice so that nobody shoud experience a full brick again (i.e. the 3DS doesn't boot, even in safe mode). Thus, this version should be almost brick-proof.
Menuhax users will have to remove their extdata folders 00000082 (JAP), 0000008f (US), 00000098 (EUR), after downgrading.
By the way, I've deleted my sysUpdater fork repo on purpose."
reddit link: https://www.reddit.com/r/3dshacks/comments/3zl47b/please_use_the_latest_version_of_sysupdater/