REG ADD HKEY_LOCAL_MACHINE\SOFTWARE\Classes\SystemFileAssociations\.html\shell\edit\command /f /ve /t REG_EXPAND_SZ /d "\"^%ProgramFiles^%\Notepad++\notepad++.exe\" %1"
This will create a new key and add an Edit option to the file context menu!
REG ADD HKEY_LOCAL_MACHINE\SOFTWARE\Classes\SystemFileAssociations\.html\shell\edit\command /f /ve /t REG_EXPAND_SZ /d "\"^%ProgramFiles^%\Notepad++\notepad++.exe\" %1"
This will create a new key and add an Edit option to the file context menu!