following Mattytrogs steps:
Brief instructions...
1) Dump all files in Dump To SD to SD card.
2) Install TegraRCMGUI
3) Get BIS keys. Use BISkeydump or launch Switchboot (in tools / info - dump all keys)
4) Restore console using "Use On PC" - "6.2.0 restore Files".
5) Restore from file...