I reinstalled from within Steam. I put it in the D: drive (1TB hard drive as opposed to my C: (250MB SSD, which has little room left).
Prompted by your last post, it I have apparently blundered (as often seems to happen when I diddle around with a problem) into at least a partial solution.
I went and had a look in the file with the FELH executables: D:\SteamLibrary\steamapps\common\FE Legendary Heroes.
There, I found these executables: DXAtlas.exe; LegendaryHeros.exe; LH_prefs_setup.exe; SDActivate.exe.
I tried running LegendaryHeroes.exe from this folder and got a message that the program could not run because there was no vcruntime140.dll file. I did a bit of internet search and came up with vc_redist.x86.exe and vc_redist.x64.exe, which I installed in this same folder. I then ran those programs which installed without a hitch (unlike the other time that I recounted for you above in this thread -- with the problems you noted with concern).
Anyway, the game now runs. I must say that I still can find no vcruntime140.dll for this game anywhere on my computer (puzzling to me, but moot, I guess, since the game seems to run without problem).
None of the other executalbles in this folder will run by double-clicking -- just a VERY brief message (too fast to read) and then nothing further.
I WOULD LIKE to be able to run the LH_prefs_setup.exe program. How do I do that? As I said, it does not run by double-clicking the file here in this folder -- a VERY brief message flashes (too quick for me to read), disappears, and then nothing else happens.
I would thank you for any help or suggestion on this remaining issue, and AGAIN, I THANK YOU FOR YOUR HELP so far.