Search fails in PDF Architect 7.1

Just purchased PDF Architect Pro to redact some documents. I first tried searching for the sensitive information so I could prove that it was no longer found after redacting. But PDF Architect shows "no results found". I opened the same document in Foxit Reader and it found the text without problem. Is there a problem with PDF Architect's search feature? Searching worked in another document but it does not highlight the found text. Why isn't the found text hightlighted? Is there a setting I am missint?