How Do I update my Bios?

I cant download from the xfx website, so Ive downloaded the bios from a different website. it downloaded 2 things A7538NX3.10P - 10P File and notepad message it reads,This is the BIN file for use with the appropiate WinFlash utility for your Mainboard. So question is, what do I do now? Best answer will be chosen
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