Upload single file involves so little commands that it it enough to provide them on command line, saving writing a script file:

winscp.com user@example.com /command "put examplefile.txt /home/user/" "exit"

You can use any available scripting language you have on the local host to generate appropriate WinSCP script. Following example uses PHP language:

get /home/user/examplefile.txt *.<?=date("YmdHis")?>.txt
exit

When executed, the generated WinSCP script file may look like:

get /home/user/examplefile.txt *.20060605090825.txt
exit

Now pass the generated script file as input to WinSCP:

php -q download.php | winscp.com user@example.com /script="%temp%\download.tmp"

If you do not have a scripting language on the local host, you can use remote-side script (like shell script). This approach requires opening separate shell session to invoke remote-side scripting.

# Make copy of the remote file to temporary timestamped file.
# Also add unique extension to easily find the file in the temporary directory.
call cp /home/user/examplefile.txt /tmp/examplefile.`date +%Y%m%d%H%M%S`.unique
# Download all the files with the unique extension.
# There should be only one, the one just created.
# While downloading, remove the unique extension.
get /tmp/*.unique *.
# Remove the temporary file.
rm /tmp/*.unique
exit

The script below requires opening separate shell session to invoke remote-side scripting.

# Make copy of the most recent file using remote command to new name
# with unique extension to easily find the file in the temporary directory.
call cp `ls -t | head -1` /tmp/`ls -t | head -1`.latest
# Download all the files with the unique extension.
# There should be only one, the one just created.
# While downloading, remove the unique extension.
get /tmp/*.latest *.
# Remove the temporary file.
rm /tmp/*.latest
exit

WinSCP does not support move command for local files. Instead you can combine WinSCP script with batch file:

# Make the script abort on any error
option batch abort
# Connect
open session
# Upload the files
put *.*

Launch the above script from batch file like the one below:

winscp.com /script=example.txt
if errorlevel 1 goto error

echo Upload succeeded, moving local files
move *.* c:\backup\
exit

:error
echo Upload failed, keeping local files