Open the folder containing your Nik Software configuration. The easiest way to get there is to type the following into the Windows-Run window:
“%userprofile%\Local Settings\Application Data\Nik Software\HDR Efex Pro 2”
Open the HDREfexPro2.cfg file in a text-editor, and add this small XML snippet into the top of the file:
Start HDR Efex Pro-2, and start playing with HDR!