TD-SCAN has been discontinued and replaced by TD-ScanPro.  Get the full credit of TD-SCAN ($1500) and upgrade to TD-ScanPro.  Regular price for TD-ScanPro perpetual license is $4800.  Trade-in TD-SCAN and get TD-ScanPro for only $3300.  Details benefits of TD-ScanPro is available at tessi.com/td-scanpro.