GA-Z170X-Gaming 3 (rev. 1.0) Hyrican Bios

Hello. I have a gigabyte mb (GA-Z170X-Gaming 3 ) with a custom bios from hyrican “F5”(Germany reseler).Is possible to reflash with latest bios “F22j” from gigabyte? https://www.gigabyte.com/Motherboard/GA-…support-dl-bios
Thank You!

well you can update to F22j but you can never go back to the F5 version as the F20 & greater versions prohibit bios downgrades

Bios flashing is locked by reseler.How to flash it?with external programmer?