Thanks for the suggestions. I tried Skysight a few times today with the
same problem appearing, I just tried it again. The screen propagates
with the "Height of Thermals" as a default initial display. I changed it
to "Thermal Strength" and it works properly.
However, once I try to select any other menu choice such as "Thermal
Layer Wind," the screen freezes. No zoom can be accomplished, and no
other menu item can be selected with positive result. In addition,
scrolling is disabled, and the only thing that works is to close the
program entirely. Restarting the program and duplicating my input gives
the same result.
I am using a 2 year old HP Envy laptop running Windows 11, so it isn't
like I am trying to flog a Windows 98 machine. I restarted my machine
yesterday with no issues. I guess I will try that again and report back.