If Exist "%Distr%\ADDONS.HTM" (
  If Exist "%Distr%\ADDONS.TXT" Del "%Distr%\ADDONS.TXT"  
)

If Exist "%I386%\ADDONS.LST" (
  If Exist "%~dp0ADDONS.LST" Del "%~dp0ADDONS.LST" 
  For /F "usebackq Delims=" %%I In ("%I386%\ADDONS.LST") Do (
    If /I Not "%%I"=="Addons\%~nx1" Echo %%I>>"%~dp0ADDONS.LST"
  )
  Type "%~dp0ADDONS.LST" >"%I386%\ADDONS.LST"
)
