Download Amlogic ing Tool v.1.6.2.2

Download Amlogic ing Tool v.1.6.2.2 from here, here or here.
Modes description:

- none
- recommended mode; do not erase nand (user data will be safe); flash new firmware

- erase old system, reset and re-
- recommended mode; erase nand (user data will be lost); reboot; flash new firmware

- erase nand
- erase nand (user data will be lost)

- no hub support
- turn off hub support

- force write efuse
- not-recommended mode: destroy bootloader (rl-time reprogramming of chip); check bootloader, kernel, CMOS.

See more details, tutorials and user manual in this post.