Change file.bak to file.plr W/H GUI (Batch)

:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::Change file.bak to file.plr                                ::
::Created by RU$$ [http://russdev.mooo.com/]                 ::
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
@ECHO OFF
@SETLOCAL
@TITLE Change file.bak to file.plr
@CD C:\Users\%username%\Documents\My Games\Terraria\Players
@GOTO :MAIN

:MAIN
cls
echo ::BAK Files In This Directory::
echo.
dir /b /a-d *.bak
echo.

Echo Select the save file you wish to convert from. (Must include extension)
Set /p FILE=File Name:

If exist %FILE% (GOTO :EXISTS) else (GOTO :ERROR)

:EXISTS
cls

Echo STATUS: File was found, proceding with conversion.
echo.

set efile=%FILE%
set endbit=%efile:*.=%
call set final=%%efile:%endbit%=%%

COPY "%FILE%" "%final%plr" /Y
cls
echo The file was changed to %final%plr! Returning..
echo.
pause
GOTO :MAIN

:ERROR
cls

Echo ERROR: File not found! Returning..
Echo.

Pause.
GOTO :MAIN