Martin,
You are right: Switching read and write monitoring to NO for the Hard Drive eliminated the persistent chirping-clicking in version 4.38.
Thanks again for for your superb support of a stellar utility!
--John
After I routinely upgraded to version 4.38 this morning from the prior beta, I kept hearing the normal sensor-initiation chirps long after I had started the program--about three-to-five per minute. This click-chirp sound is very similar--if not identical--to what I had experienced with SpeedFan...