Big thanks that worked.

It's:

See https://winscp.net/eng/docs/scriptcommand_open

WinSCP GUI can generate the script for you:
https://winscp.net/eng/docs/ui_generateurl#script

Hello,
After following scripting documentation on the site i created two batches to automate transfer,

But neither did work, the first one terminated after starting session due to passive mode is on,

I tried both following commands to turn passive mode off:
open -passive=off and
passive=off

Neither worked.

Script 1:
option batch abort
option confirm off
open-passive=off
open ftp://xxxxxx
synchronize remote D:\xxx /xxx

Script 2:
winscp.exe "Site" /defaults /synchronize "D:\xxx" "/xxx"

The second script open UI and shows files ready to transfer just needs to click OK button.

How can i accomplish automate transfer with any script?

Many thanks.