If you have an old version 3 license that isn't working, the company offers upgrade paths to Version 5 at a lower cost than a full new license.
Quite Imposing Plus 3 is an older version. If you have upgraded to the latest version of Adobe Acrobat (64-bit), your old serial number and private code for version 3 . You will need to upgrade to Quite Imposing Plus 5 to maintain compatibility with modern operating systems. 2. Contact Quite Software Support quite imposing plus 3 serial number private code work