This is a tutorial link that changes a guest account into an administrator account.
https://www.tenforums.com/user-accou...r-account.html
If you can't do it that way then you'll have to make yourself a member at
https://www.tenforums.com/ and they will help you to change an account type.
Do what these people tell you to do and they'll sort it out for you, Do Not take 15 posts to tell them about your account problem when 1 will suffice.