Security Options

Click the "Settings" button and when the open file dialog appears, then select the "PDF Security " pages.

Usually,There are some PDF documents which encrypted, they cannot be edited or their contents cannot be copied,you will need a password even to see the contents of the documents. Thus, in order to convert the documents, you will need to provide one or even two passwords - one is the owner password and the other is the user password. The program automatically determines the need of the password and will try to use the list of the passwords you have provided.