I would wish myself for FTP a manual local-remote-timestamp-difference adjustment.
Strangely, in command line mode, everything works like a charm with keepuptodate.
But in GUI mode, you have always during summer, with DST in place, after the first upload of a file to be worked on, that the local file looks an hour older than the remote and WSCP refuses to upload.
With SFTP, you can fortunately choose -server -edit -advanced -adjust remote timestamp with DST.
Thanks for wscp -