PDFdecrypterpro is intended to remove restrictions from password-protected PDFs. This way, after processing the intended files, you are allowed to print them or copy parts of their contents. Likewise, other PDF elements, like annotations and forms become editable. It is a shame that the link to the online help documentation is broken; however, you may still consult the online video tutorial instead.
The application has a compact and intuitive interface that resembles those of many other similar tools, so I guess you will have no difficulty using it. The first thing you should do is import the PDFs you want to remove restrictions from. This can be done by the usual method of browsing for them in Finder, but the possibility of simply dragging and dropping them onto the window is also appreciated. Luckily, the application supports processing a batch of files as a single operation.
The tool is said to support various types of encryption, including 40-bit RC4 decryption, 128-bit RC4 decryption and AES decryption. It is also good that it does not require any third-party app or extension installed on your machine.
As it seems, the tool cannot really unprotect a file unless you know the secret code. In this respect, I did not have a good experience because not only did the application ask for the password, but also failed to recognize it as a good one when I entered it. Then, without any explanation, it simply quit. However, it allowed me to import an unprotected PDF. Instead, it should alert users that there is no purpose in loading an unrestricted file.
All in all, PDFdecrypterpro would be a good idea if it worked as expected. In this respect, and this is from my personal experience, the trial version was quite unable to convince me that I should buy the full version. By the way, the Pro in the name seems somewhat misleading as there is no standard version as far as I can tell.
