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It is possible but not recommended, How ever if toy still need to do it it's the same process as updating the firmware just run a previous version package.
I already tried that but I'm getting this message:
BIOS or ME update failure
The capsule file failed in the security compliance check.
Please refer to BIOS release note for details.
A new update. I tried to use a recovery BIOS from a previous version and following the steps for the recovering process I was able to downgrade the version I had, from this point I followed the procedure you suggested and the downgrading process to the version I needed was successful this time.