Those images for my previous post are in
https://ibb.co/98XLC6m
and
https://ibb.co/NV52808
which can be viewed in a web browser.
I put those links between img tags in the previous post but it looks like that didn't work.

I tried to attach images using the feature in this forum, but didn't see them in the preview.  Then added image links to imgbb server but still don't see them in preview.

The first image shows the file locations.   Looks the same as the suggestion sent in an earlier post.

And below that is a simple Flight Plan and result of clicking the Plan Elevation button showing no altitude data, where my flight plan itself apparently CAN read elevation info since it shows reasonable MEF and Cruise Altitude for this area.

I downloaded and extracted all the elevation data files into DEM folder in my PlanGv4 folder.  Still I get no data in the Plan Elevation, for a loaded flight plan. 

Can't get Plan Elevation in V4.0.0.259 to show anything.  Running W11.  The window comes up with the Y axis from 0 to about 1 ft. and distance of 0 to 1nm on the X axis.   Loading the same .plg file in Version 3.2.2.167 this plan shows some peaks up to about 10000ft.  Would attach .plg but can't see way to attach a file here.