A single file upload involves so few commands that it is enough to provide them on the command line, saving writing a script file:
winscp.com /command "option batch abort" "option confirm off" "open sftp://user:email@example.com/" "put examplefile.txt /home/user/" "exit"
However you may want to use a script file anyway, so you can later expand it:
option batch abort option confirm off open sftp://user:firstname.lastname@example.org/ put examplefile.txt /home/user/ exit
To run the script use following command (providing you have saved the script to file
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