I'll see if I can help you out. I spotted a couple of things in the text you pasted.
ssh [email protected]
Ok. After you login, you should end up with the following:
Your next line looks a bit odd:
Family-Apple-TV:~ root# /private/var/mobile/Library/Mobile/Kodi/addons/
-sh: /private/var/mobile/Library/Mobile/Kodi/addons/: No such file or directory
It looks like you left off the "cd" bit, and had /private first. That's why it said "No such file or directory"
Then, your next line has:
Family-Apple-TV:~ root# /cd/var/mobile/Library/Prefernces/Kodi/userdata
-sh: /cd/var/mobile/Library/Prefernces/Kodi/userdata: No such file or directory
Ok - two things might be wrong here. First, get rid of the "/" before cd, make sure there's a space, then start the rest of the text. Also, you spelt Preferences incorrectly, but that may have been a typo when you were writing the post on here. Finally, put a "/" on the end
So, this is what yours should look like when you type it in to Terminal:
Family-Apple-TV:~ root# cd /var/mobile/Library/Preferences/Kodi/userdata/
The bit you are going to post in is: "cd /var/mobile/Library/Preferences/Kodi/userdata/" (without the " marks)
If you get it right, you should see the following in Terminal:
The "rm guisettings.xml" command should then work.
Hopefully this is helpful.