Поиск файла и замена в нем текста

rem @echo  off
setlocal enabledelayedexpansion
rem for /f "tokens=*" %%a in ('Dir /b/s/a-d C:\Users\%USERNAME%\AppData\Roaming\Thunderbird\Profiles\prefs.js') Do Set new=%%a
Set infile=%new%
Set find=server1
Set replace=server2
@echo off
setlocal enabledelayedexpansion
set COUNT=0
for /F "tokens=* delims=," %%n in (!infile!) do (
set LINE=%%n
set TMPR=!LINE:%find%=%replace%!
Echo !TMPR!>>TMP.TXT
)
move TMP.TXT %infile%
pause

@echo off
setlocal enabledelayedexpansion
set "infile=%Userprofile%\AppData\Roaming\Thunderbird\Profiles\prefs.js"
set "sfind=server1"
set "replace=server2"
<"%infile%">$ (for /f "delims=" %%a in ('more') do @(set "s=%%a"& echo %%a|>nul find "%sfind%" && echo !s:%sfind%=%replace%! || echo %%a))& move $ "%infile%"
exit

@echo off
setlocal enabledelayedexpansion
set "d=%Userprofile%\AppData\Roaming\Thunderbird\Profiles"
set "sfind=server1"
set "replace=server2"
for /f "delims=" %%a in ('dir/a-d/b "%d%\p*.js"') do @(
 <"%d%\%%a">$ (for /f "delims=" %%b in ('more') do @(set "s=%%a"& echo %%b|>nul find "%sfind%" && echo !s:%sfind%=%replace%! || echo %%b))& move $ "%infile%"
)
exit

@echo off
setlocal enabledelayedexpansion
set "d=%Userprofile%\AppData\Roaming\Thunderbird\Profiles"
set "sfind=server1"
set "replace=server2"
for /f "delims=" %%a in ('dir/a-d/b/s "%d%"^|find "prefs.js"') do (
 <"%%a">$ (for /f "delims=" %%b in ('more') do @(set "s=%%b"& echo %%b|>nul find "%sfind%" && echo !s:%sfind%=%replace%! || echo %%b))& move $ "%%a"
)
exit