Modifying the security settings
This feature is available only in PaperPort Professional.
Select a PDF file in Desktop View.
Enter the permissions password for the selected PDF file in the Security Password dialog box, then click OK.
Make the required changes in the PDF Security dialog box.
If a PDF file is protected with both open and permissions passwords, you have to enter the permissions password to make security settings modifications or to remove the passwords. If you enter only the open password you cannot make any changes, you can only look at the current settings.