hi, i downloaded that link, all went well till i tried to open the airnav program, i had messages come up like acess denied, not recognised invalid file etc, when i clicked ok the pc went haywire as if some rogue file had took over or some thing, i tried this several times, and the only way i could stop it was to restart it, it will work with version 3.13 but not 5, do i need any updates or will i be ok with what i have thank's jeff.