Copy the userDefineLang.xml to %APPDATA%\Notepad++\userDefineLangs if there is no userDefineLang.xml existing yet,
or merge the two UserLang entries to your already existing userDefineLang.xml.
If you use an older version, there may be no userDefineLangs folder in the Notepad++ folder,
then copy it to the Notepad++ folder directly.
Restart Notepad++
