Which FW for Jumper F405 Xiake800?

Hi guys, I would like to use the HD OSD canvas on the xiake800nwith FC Jumper f405, but I can’t find the OSDx_TXT_RES parameter, probably because old firmware (4.2.2).

So I would like to upgrade but I can’t find in the list of boards the Jumper f405 and I don’t know how to see which firmware has been loaded in, except the version number…

How I can upgrade? Thanks for your help

I’m in the same boat. Did you ever find the answer?