The temperature that's probably referring to the actual CPU is the one (or ones) labeled "Core 0/1/2/3/..." - check in the "Configure" screen
to make sure.  For instance for an Intel CPU, the CPU core temperature should have a "Chip" value of "INTEL CORE" or something.

This is the temperature that you'll want to show in the system tray; make sure it's the only entry in the Configure screen whose "Show in
tray" checkbox is selected.

NOTE:
Yes, this bit is somewhat annoying, but *do it anyway, immediately* - set up alarm events to beep and popup a message when the CPU gets too
hot; say, above 80C.  It might be bothersome, but not half as bad as the CPU dying because it's melted!  The CPU *WILL* get too hot at some
point as dust makes its way in between the CPU and heatsink and/or the thermal paste melts off.  This has to be done from the 'Events' tab
in 'Configure'; the 'Warning' value in the 'Temperatures' tab seems to have no effect.
See alarmConfig.png for an example setup.
