Do you know which version it is?
example: I want to edit the toolbox.json file.
{
"name" : "BootSound NX"",
"tid" : "00FF0000000002AA",
"requires_reboot": true,
"version": "X.XX"
}
My Wii U freezes on the browser screen; with a lot of effort and trial and error, I manage to exploit it.
I want to try downgrading and see if that solves the problem. I believe it happened due to some old jailbreak.