Automatic multi-level bookmark creation based on PDF contents

For years we've been using an add-in called Debenu Aerialist to scan our reports looking for keywords & it would build multi-level bookmarks for us. It has always worked great, but it's now having some issues. For one the add-in only works on 32bit Acrobat, but the main issue now is it will no longer remembers its settings. Even when I enter its activation code, it still runs in demo mode and adds a watermark. Unfortunately, the add-in creator/developer is no longer in business, so I can no longer get it to work. Does anyone know of an alternative way of creating these types of bookmarks?