[REQUEST] V5-571G Bios Update from v1.22 to v2.18

Hi
i need help how to update my BIOS from v1 to v2, i know i had before InsydeH20 v2 but somehow 2 years ago i downgraded it to v1...

im now on windows 7 and i think it will be possible when i update to v2.18 to switch do Legacy Boot so i can boot Windows 7 with MBR?
i need v2.18 bios because of more options in bios like to switch graphic from auto swich HD 3000 / Nvidia 610M > to only Nvidia 610M running

when i start v2.18 exe in windows 7 it gives me an error message saying to update to the same type of BIOS (v1.x), i extracted the exe with 7zip copied to FAT32 formated USB, booted with POWER OFF, HOLD FN+ESC > POWER CABLE IN > +POWER BUTTON it boots from USB but i get same DOS error update to the same type of BIOS (v1.x)

please can some tell me how to force flash new BIOS v2.18 ? 

Model: V5-571G
BIOS: 1.22

Link actual BIOS 1.22 http://global-download.acer.com/GDFiles/...&SC=EMEA_8


Requested BIOS v2.18 http://global-download.acer.com/GDFiles/...&SC=EMEA_8

if possible for advanced settings to turn on in v2.18 will be great!