If you plan to use UNICOM Intelligence Interviewer - Paper/Scan Add-on, you must install it at the same time you install UNICOM Intelligence Interviewer - Paper. It is not possible to add UNICOM Intelligence Interviewer - Paper/Scan Add-on to an existing UNICOM Intelligence Interviewer - Paper installation. You must remove UNICOM Intelligence Interviewer - Paper and then install both UNICOM Intelligence Interviewer - Paper and UNICOM Intelligence Interviewer - Paper/Scan Add-on at the same time.