@echo off
setlocal enabledelayedexpansion

set "source_dir=\\tsclient\E\tmp\kiss\scn"
set "tool_path=D:\app\FreeMoteToolkit\PsbDecompile.exe"

for %%f in ("%source_dir%\*.scn") do (
    set "file_path=%%f"
    echo Processing !file_path!
    "%tool_path%" "!file_path!"
)

echo All files processed.

endlocal