I tried opening the program as a normal user and it works properly with this setting too.
The error was the one of which I posted the screenshot on my first post on this thread.

Code 2. The system could not find the file.

Seems all is working now with the latest version. If something comes up again I will let you know.

OK, I've misread your other post. So does that mean it still does not work when you run the latest WinSCP with normal privileges? And it works with normal privileges with 5.17.4? You should not need to run WinSCP as Administrator to use the function. So what is the full error message?

Thank you for your concern. It works perfectly now with the last version as long I open the program as administrator.
Again, great program, useful tool, with many features and well maintained!
As far as I know, is the only FTP program that allows you to copy the HTTP URL of a file on the server or open it online.
Thank you!

If you now re-install the latest version, will it work or not? Please post a full error message, if it stops working again. I cannot reproduce the problem.

I found that running the WinSCP as administrator solved the issue. It now works properly with the last version.

First of all a great thanks for such a useful free program.
It's one of the best FTP clients if not THE best for its many options and tools.
FYI: After I installed version 5.19.4, the generator of HTTP URL command stopped working.

Cannot execute 'powershell.exe -ExecutionPolicy -Bypass -STA -NoProfile -File "C:\Program Files (x86)\WinSCP\Extensions\GenerateHttpUrl.WinSCPextension.ps1" -webRoot

The error was that the system could not find the file.
But in all previous versions worked perfectly.
I spent at least two hours trying different configurations and other ways.
Nothing worked.
In the end, I reinstalled an older version 5.17.4 (build 10410) and it works perfectly again.
Thank you again :-)