ZINCB  Forgot to add that the license is for one _machine_, not one user, so if you have a desktop PC at work and a laptop at home & telecommute some days of the week, you will need two copies.   
(Version 2.0.3.6)

ZINCB  Here are a few items that I learned the hard way:

1. It is not clearly stated on their website, but you will need a full copy of Adobe Acrobat Standard or Professional, even if you only want to scrape data off of a PDF form. Acrobat Reader is not sufficient. The requirements state that you will need a full copy of Acrobat to _create_ a PDF form, but not that you will need a full copy if you already have a form and just want to import its data into a Filemaker database.

2. You better be very familiar with scripting with extensions. This is not a hand-holding user-friendly whiz-bang GUI plug-in. Happily, the scripts in the demo file are not locked and will help you figure this plug-in out waymore better than the included sparse, no-examples, (PDF) user manual.

Still waiting for my full copy of Acrobat to arrive, so can't tell you how well it works with pulling dates out of digital signatures, etc...  
(Version 2.0.3.6)