Thanks for your suggestion.
Will see if more people ask for this.

Btw, Do you know that you can assign a keyboard shortcut to the custom command?

Hello,
Double-Click use operation to perform to select what should WinSCP do when you double-click file in file panel:

Open - open file.
Copy - transfer file (upload or download).
Edit (default) - edit file.

Please, can you add COMMAND in the list like:

Open - open file.
Copy - transfer file (upload or download).
Edit (default) - edit file.
Command *new

Example: Double-click -> echo "winner: " >> !
With this option the user can use explorer interface with very power usability.

Thanks