So that the Blend Algebra and Blend Program icons would be visible, I updated the AppImages.  A few fixes are in too as noted (hopefully technically correct) in the Release Notes shown last here.

Plus, I did put Andrea's experimental/testing of Gimp-like overlay algorithms for Addition, Subtraction, Divide, and Multiply using the Blend Algebra plugin at: https:/cinelerra-gg.org/download/testing/BlendPluginExamples/gimp_.zip   .  Removed GIT manual reference to Overlays but a little late.

GIT for Cinelerra-GG has the following changes from 03/01/2025-03/31/2025
Blend Algebra and Blend Program modifications include the following:
  - Icons for Cinfinity and Cinfinity2 have been created by IgorB.
  - Code changes by the author, Georgy, to both plugins:
   1) Buttons =>project, userlib, syslib will also display the target dir when the function name is blank.
   2) Refresh will now immediately recompile that function (if any) which is under the
      timeline cursor when source is newer than shared object. This does not affect the other
      functions which are not under the cursor and they will still be recompiled on first access.
   3) Added “output track” of Blend Algebra which was missing in copy/interpolate functions.
   4) Improved robustness of code to prevent race conditions between threads of different windows
      when closing or resizing dialog menus.
  Screencapture for NetBSD failure has been fixed by adding fallback in case shm capture does not
work by Andrew-R. This fix may be applicable to other Operating Systems.