#1. "RE: Color efex pro 3 and cnx 2 version" In response to Reply # 0
No, you need to buy the CEP3 version designed for CNX2 to make it work in CNX2.
However, you can get the Lightroom version to run as a standalone program, but it will not work on NEFs. You can save your NEF's from CNX2 as JPGs or TIFs and open them with CEP, or you can use the "Open With" menui tem in CNX2 to gnerate a TIF that automatically opens in CEP3. To make this work, you need to set the "Open With Application" preference in CNX2 to use CEP3.