No overwrite existing file

@echo off
echo --------------------------
echo Trasferimento FTP avviato anno 2009
echo --------------------------
echo INIZIO %date% %time%
echo INIZIO %date% %time% > c:\LogWinscp2009.txt
E:
WinSCP.com /script=C:\uploadscript2009.txt >> c:\LogWinscp2009.txt
echo ---------
echo F I N E
echo ---------
echo FINE %date% %time%
echo FINE %date% %time% >> c:\LogWinscp2009.txt

option echo off
option batch on
option confirm off
open ftp://username:password@ipaddress
cd /prod01_img_HYPERDOC/PROT/2015
lcd "E:\Protocollo\docs\2015"
put *.*
exit

synchronize local -criteria=none /dir/*  C:\

synchronize local -criteria=none /dir  C:\

synchronize local -criteria=none /dir/*(remote first)  C:\ (local second)