It has instructions on what to do. If for some reason after following the instructions it does not work for you try installing the file into your eq2 directory.
Not a ProfitUI specific issue, and TalTal's link is not a pay service, but you can find a copy of the file in your Everquest II\LegendsOfNorrath folder, for example.
Also the question has come up before, next time use the search function please.