Where is pdfpen

When I open hazel and want to search for a rule I enter my search in the search box. When I type the second letter of the search a dialog pops up which is entitled 'where is pdfpenpro.app'?
I don't have pdf pen. If I cancel and enter the search again I get no pop up and everything works normally.
Any idea what the issue is?
thanks
I don't have pdf pen. If I cancel and enter the search again I get no pop up and everything works normally.
Any idea what the issue is?
thanks