If you are using LW 4, grab one of the corners of the window & try to drag it down ... you should be able to drag one of the edges or corners sideway or/& down. Not sure this works with LW 5 but worth a try.
If your resolution is an issue with LW appearing too large, see
http://www.gnutellaforums.com/gettin...-limewire.html though not sure if this applies to Options window.
If none of that works, try deleting your LW prefs folder whilst LW is CLOSED; instructions here:
Point #3 in Fixes for Limewire (sample image included at bottom of page.)
Or if using Vista see
http://www.gnutellaforums.com/genera...der-vista.html. And remove the entire limewire folder in preferences.