After reinstall of Windows 7 on new SSD with updates and drivers I installed HWiNFO and Monitor Gadget.
After that I added HDD drive and copied Windows temp files to new location.
From that moment gadget stopped showing any monitors (even in settings window).
Task Manager shows gadget process.
I reinstalled HWiNFO64 after uninstaling it with iobit uninsataler (with cleaning registry).
I uninstalled Gadget several times and deleted its files from AppData.
I have a hunch that monitor gadget still leaves some files somewhere after i uninstal it and "remembers" its settings when temp files was on C: drive.
so after long explanation i guess question is:
HOW TO DO CLEAN REINSTALL OF MONITOR GADGET?