For AMI Bios use AMIBCP to unlock extra menu options, MMTool to extract/exchange Modules and Microcodes, for everything else (or if the other things dont work) use UBU + Hex Edit. The AMI Tools are sometimes hard to find because AMI is on a rampage taking down downloads.Can you provide more info? Which intel bios editor tool? I didn't know there was an official one other than the Integrator Toolkit.
If you need an SPI flasher i'd suggest the CH341a with a SOIC8 clip cable, works under Windows with the chinese software and under linux (faster and verifies automatically) with flashrom. On Asus Boards you can sometimes get away with the build in flashback function, but it's always better to have a programmer for possible mess-ups.
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