Just delete all local files and download the latest one.
See https://winscp.net/eng/docs/script_download_most_recent_file

I was able to download last updated file from ftp thru winscp (sftp)batch file.
File name changes every night on remote ftp site with file_name_mm_dd_yyyy_hh_mm.sec.
As file name changes with date time stamp we like to keep only newer file on local drive not all previous date file.
Question is which option to use synchronize or get (which is working file to get only recent file from remote ftp)

Thanks for reading my post.