Hi there, I recently tried the 14-day version of the "professional" plan for Dropbox. I was hoping that it would retroactively go back and do an OCR read of my scanned PDFs from a photocopy machine a few years ago. I have dozens of book chapters that I would like to make searchable. They were scanned into a Ricoh machine on campus. So far, it doesn't seem to OCR on older files. Does this take time? Did I not read something close enough?