NCSS 2004 and NCSS 2001 Updates
Existing customers owning a license to NCSS 2004 or NCSS 2001 may download and install this file to update to the latest release of the software. This update will install NCSS 2004, but your NCSS 2001 serial number will continue to work. Some new procedures were added in 2004, but with an NCSS 2001 serial number, you will still only be able to use the procedures that were available in NCSS 2001. For upgrade information click here. In this version, NCSS 2004 and PASS 2005 are combined into one physical program.