use with_suffix() to append .exe for Windows platforms

                raise NotImplementedError(

                    f"wav-diff tool not available for {curr_platform}"

                )

            search_path = toolsdir.joinpath(curr_platform.replace("Windows", "Win32"))

            wdiff = search_path.joinpath("wav-diff")

            wdiff = search_path.joinpath("wav-diff").with_suffix(".exe" if curr_platform == "Windows" else "")

            if not wdiff.exists():

                wdiff = shutil.which("wav-diff")