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I just copy paste all FIVE !!! to a notepad file.
then used the private one to log in
and my browser asked to update.

So if you CHANGE it your browser should prompt.
I'm not sure if your on a phone how to check.
but just make sure to use the posting one, that way your $$$ are not accessible if something happens......I only log in with the other keys when moving $$ etc.
hope that helps some