Smoke Detector Application

I'm using version 3.6.3 of Application Wavetool and follow the EVAL-ADPD188BIZ-SK User Guide. With version 3.6.3 of Application Wavetool , how can I subtract the mean value from from raw data on SlotA and B vs time? The current guide appears to be outdated and the "Subtract mean form Offsets" button is not shown in Statistics windows.