Automated download files from ftps server with multi thread

I am using WinSCP to download files from FTPS server automatically. What make me confused is that I configured 9 threads in WinSCP.ini, but when I run the script, there is ONLY 1 thread running. WinSCP Version: 5.13 OS: Windows 10 /7

WinSCP scripting does not support parallel transfers.

Though you can implement it on your own.
See Automating transfers in parallel connections over SFTP/FTP protocol

Hello, Martin, may I vote for RFE to implement such a feature out of the box of command line mode of WinSCP? There are cases, which are hard to run own code.

Regards, Stepan

I have added this request to the tracker:
Bug 2081 – Parallel transfers using multiple connections in scripting
You can vote for it there.