[Georgio]

Код:

@echo off
setlocal enabledelayedexpansion
for %%i in (1 2) do (
 >nul findstr /irxc:"button[0-9]*=C:\\Program Files\\TeraCopy\\teracopy\.exe,%%i" "Default.bar"|| (
  for /f "usebackq delims=" %%j in ("Default.bar") do (
   set last_string=%%j
  )
  for /f "delims=$=" %%j in ("!last_string:menu=$!") do (
   set /a next_number=%%j+1
  )
  (
   echo button!next_number!=C:\Program Files\TeraCopy\teracopy.exe,%%i
   echo cmd!next_number!=C:\Program Files\TeraCopy\teracopy.exe
   echo param!next_number!=Copy *"%%L" "%%T"
   echo path!next_number!=C:\Program Files\TeraCopy\
   echo menu!next_number!=TeraCopy
  )>>"Default.bar"
 )
)
endlocal
exit /b