Renami zip batch file

RenameZip.bat

@echo off
setlocal enabledelayedexpansion

for %%f in (*.zip.*) do (
    set "filename=%%f"
    if /i not "!filename:~-4!"==".zip" (
        echo Renaming !filename! to !filename!.zip
        ren "!filename!" "!filename!.zip"
    ) else (
        set "restoredFilename=!filename:~0,-4!"
        echo Restoring zip file !restoredFilename!
        ren "!filename!" "!restoredFilename!"
    )
)

endlocal