G450 bios update/downgrade problem

[hertell]

I'm having trouble with downgrading the BIOS of my G450 (can't get the DVDMax to work after I updated it a while ago). I get the message that the BIOS is the same version as before (2.0 - 36), even if I download an older version of the setup-utility (2.55).

If this is not the correct way in downgrading the bios, then is there any other ways i could do it?

[UtwigMU]

BIOS file is the same between 255 and lattest, only updater has changed.