Hi,
Sorry for the late reply due to the the Mid-autumn Festival.
Here is the like of the firmware for your unit RQ0269E.
https://mega.nz/#!ZYFCGIZY!vlVpc2S_zPiz ... xD2mRZkC60Please download through your browser,copy all files to an empty sd card with FAT32 format, insert the sd card to GPS slot.
Power on your car, then press the RST hole and the power button at the same time, keep them about 3-5 second, release the RST hole, then release the power button, the unit will enter the recovery mode.
Short press the power button to choose the recovery option, and long press the power button to enter the "update system/mcu image from sd card and clear all up".
Regards