(Request) Fujitsu ESPRIMO D538

[HavoKVXR]

For some reason, the motherboard is only running my NVME at x2, it should allow it to run x3x4, so not getting full output from it currently.
The BIOS is a little locked down, so not able to change any settings for it.

Is it possible to unlock the menu for PCIe at all? Not to bothered about anything else, just annoying that I can't make changes. 

The motherboard is a D3600-A1x

Seems to have a .ROM and a .BUP within the folder. Not sure which is needed?

Thanks,
Dave