The tools:
https://github.com/onyx-intl/rk_tool/archive/master.zip
There are several folders, one of then is named 开发工具, and inside there is a program called RKDevelopTool.exe. Change the name of the folder to ascii characters, and after it to put the program in english, you must push the button language (see the image in the other post). My solution was push the Get Bad block status.
i found two types of firmware. One of then, must be colocated in a formated with FAT (not FAT32) sd card of 2G. After formatting, copy the file update-sd.img into the sd, and start the ebook pushing at same time the power and ok button for at least five seconds.
This is the official last firmware
http://download.boyue.com/downloads/G10-0723.rar
The other firmware, necesary to use the tool, in a chinese page
http://pan.baidu.com/s/1kTmHYcB.
Direct link:
http://117.27.243.40/cdn.baidupcs.co...wsiphost=ipdbm
with this firmware, you can use other tool included called RKDeviceManage, which can update the firmware without a SD card.
To use this programs, you must connect the g10 to the pc via usb, and push the buttons ok and power for five seconds or so.