I've had the mouse wheel turned off (MOUSE_WHEEL_HZ=0) in the configuration section of writelog.ini. But now with 10.86 it's working again, sort of - either way you turn the wheel the freq goes down. Using Win 7 and K3 on real comport 1. There's only one writelog.ini on my system. How can I turn it off totally? Thanks Paul W2LE