Add kezplez-nx, that you can get all of the switch keys.Reference; Add ChoiDujourNX, that you can upgrade and downgrade the system OFFLINE. Tutorials; Removed the retroArch, because the new version is so big, you can download it from HERE; Fully support the Backup&Restore BOOT0/1, Backup&Restore whole NAND. Support the autoRCM. Oct 10, 2018 · Every time you update your Nintendo Switch you burn yet another eFuse and most of us know that these eFUSEs and every important to keep. They do this to prevent downgrading or updating the firmware of a device.