Richard,
Make sure you have the latest version 3.2.2. You may need to rebuild the index, delete all files in:
“C:\Documents and Settings\All Users\Application Data\wondertouch\particleView”
and
“C:\Documents and Settings\All Users\Application Data\wondertouch\search data”
Then rerun particleView, you should get a “building index” window with a progress bar.
John