Joying Technology Co., Ltd

I have a Joying model JY-UOS02N4GS. I see on the Blog that there is a firmware update available for my unit (https://www.joyingauto.com/blog/category/updated-files-released/). I downloaded the update but cannot find any instructions on how to install. I've searched the blog as well as this forum. Can someone provide a link to the instructions for updating firmware?

Thank you.

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