NBox HDTV ITI-5800SX Software help needed

Hello, some time ago I bought NBox HDTV model version ITI-5800SX. It stopped working because when I launch it stopped at " BOOT". I decide to upload new software because I didn't find any help. So I messed it up even more. It was half year ago maybe more, then I stopped working on it.

I started again but still can't find any solution for my problem.
I think only one option that will work is upload correct software for my nbox, but I can't find any of it.

I find this forum, here's so many informations, and knowledge to learn, but still I can't find any for me.

So my question is:

Could just someone guide me to working software which I could upload for NBox HDTV ITI-5800SX?

I don't know what rules of typing posts are here, if this all history was needed, but still Im happy that I could write this here.

Please help or something ;p
Regards - White

So, I found new soft from 2019 from sat-mar site. But I still have problem because when i start it It ends on LOAD, nothing else.

Its like : nBox > PKTN > LOAD - nothing else.

Help needed
Regards - White

My bad, I just needed to turn on NAND by pressing arrows. It works. Topic can be closed.

Regards - White