The article you refer to has a section about "scripting" implementation:
https://winscp.net/eng/docs/script_download_files_to_same_folder#script

Woops, and, yes, target directory does have a slash at the end.

I have a parent folder MainFolder, and I want all of the *PayStub.csv files from the many different folders and subfolders within MainFolder. Is there a way to do this without .NET yet? I saw the documentation on 'Downloading all files from FTP/SFTP to the same local folder'
I keep trying with:

but never ever works. Only if I change cd to the exact folder about 10 levels down will I get the csv copied over to destination folder. I'm trying to make it all-encompassing as best as possible.