I updated several Metadata fields for a PDF. It appears that FingerPDF is storing this Metadata within it's own library rather than within the PDF. The problem is that if the library needs to be rebuilt, the files shared between two computers or many other reasons it's just better for the Metadata to be updated within the file.
I resorted to updating the data temporarily within Adobe PDF Creator (not the free version) and could only find the fields for the Author name and the eBook Title. I'd like to permanently within the file store the Year and the Publisher as well but these are of limited concern as compared to the Author and the Title.
You have the beginnings of a fine program, I'm looking forward to seeing it's progression.