Hi Alex. Thanks for the speedy reply. I'm unsure why you can't download that file.
Don't assume that deleting that file won't screw something up. It might not re-make itself. And please don't update yet. If Sony do indeed block the Jailbreak, then it's blocked for good. There may be no turning back.
I know it's a crazy idea and probably won't help much, but if you want to play online, then at this moment, buy a new console. Sorry, but it's still early days. I'm sure soon, someone will work out that boot_history.dat and you'll be able too. Hopefully someone here can help you out.
Oh and you are able to download other files can't you. If you can but not the boot_history file, then it might be something else. From the old xbox1 days that had a similar thing, it was pretty much like Windows Explorer. One side had your PC, the other side had the system that you were logging into. I used FlashFXP though.
Best of luck and sorry I couldn't be more help (oh and your English was fine mate)