it had something completely different, I don't remember what it was, I probably cleared it out when i was trying to join
I'm not sure how much clearer I can make the host name. Take "mythruna" put a dot after that. Then put "game-host.org" after that. All in one string of letters and dots without any spaces.
I think if you run single player and type /clearopts in the chat bar that it resets all of the options, including the default host.