I am guessing that I am not the only person out there who has used the mouse wheel to scroll through gauge changes (bug and freq/alt etc) rather than "left click or left click hold" ? I re-loaded some software and de-fragged and here's different things I have done to try and to get it back, yet failed:

1. Reset FSX.cfg file
2. Got rid of Aero in Win7 mouse settings
3. added/deleted every possible mouse combo inside FSUIPC4 "miscellaneous". Pete Dowson wrote me that that setting is not part of FSUIPC anyway.
4. Turned on/off mouse yoke inside FSX
5. reloaded a couple of 3rd party aircraft to see if that helped....nope.

It was a really great convenience to scroll and spin dials and radio stacks rather than endlessly "click or click and hold".  Any ideas?

Thanks guys!

This is the blatantly obvious, but I had to go into the Logitech systray app and reset the function for my scroll wheel and "middle" button.  Somehow a program (or something I did) had changed the function.  Now it's back.