Re: force binary download
You are confusing FTP active/passive mode with binary/ascii mode. These are different things and can be combined in any way.
See
https://winscp.net/eng/docs/ftp#mode
https://winscp.net/eng/docs/transfer_mode
See
https://winscp.net/eng/docs/ftp#mode
https://winscp.net/eng/docs/transfer_mode