OK, I'm obviously not all that bright as I find the readme quite challenging!
BUT I have just realized that all my comments below relate to the
doc file, whereas the
AnKor Shader User ReadMe Feb 2025.txt file is the one I need!

Still, I do find the doc file confusing, so I just changed my original comments
How to install (in the doc file!) is already quite far into the readme, page 8/19 for me, so just dealing with initial ?s from that section.
2. "Copy the Reticle files into your effects/fxtextures folder"
Well since I don't see any here, I assume referring to "A package of dynamic reticles and installation instructions are available at
http://www.sim-outhouse.com/sohforums/local_links.php?catid=13&linkid=19730" which is from the .com not .org so I found it here
https://sim-outhouse.org/sohforums/threads/high_resolution_dynamic-reticle_collection-zip.94274/ . so, if one already had those from 2015, one does not have to reinstall?
3. "Edit or Replace AnKor's original TextureMagic.ini file in the shaders30 folder with the one provided (not needed if using 2019 version). Note, if you have added lines to the TextureMagic.ini as part of the installation of another add-on you will need to edit again with the new gunsight lines, and not replace the whole file."
Just to be sure, if I already use the 2019 version (with other changes), I don't have to use the one here, but keep everything else in the Main Files Shaders 30??
4. "Edit your effects.xml file to add the appropriate entries from the Gunsight List.txt file (be careful to only paste in the lines from the Effects.xml section or CFS3 will stop working!) You may want to place them at the top right after <Effects> so you can find them easier if something goes wrong."
Where is the Gunsight List.txt file, or is this again referring back to the 2015 add on?
5. "Edit the individual xdp file for each aircraft you want to have dynamic reticles. Examples are provided in the Gunsight List.txt file. These entries are placed in the effects section of the xdp at the bottom anywhere between <Effects> and </Effects>. This is how you choose which Reticle Effect will be applied to that particular aircraft so you can customize to your heart's content."
As #4, the same applies to #6