working the pandasoft exporter


ok, so i've been trying to get stuff from 3dsmax to FS, but im having trouble keeping the interior and exterior model separated in FS (they both appear as exterior, no matter what)
i figure it must have something to do with the X-file exporter i've been using (which is NOT the pandasoft, i'm not sure what it is, it was just there when i hit export...)
trouble with the pandasoft is that after i have it installed, i can't seem to find a button to USE it in 3ds max.....
its not in the utilities list.... it's not on the export dialog drop down......so where?!

i must be missing something really basic here, am i not?