Use a file mask with a time constraint. For example to download files older at least 10 minutes, use:
https://winscp.net/eng/docs/file_mask#size_time
Btw, there's no
get -delete -filemask=<2N * "E:\Films-E\"
https://winscp.net/eng/docs/file_mask#size_time
Btw, there's no
echo on
in WinSCP.