How can I buy a licence for CinEx HD 184.108.40.206?
The latest version is available for purchasing through the official website. The version you have mentioned is listed as 39 $ as a one fee payment.
Access the following link to obtain more information as well as to initiate the buying procedure: http://www.cinexhd2.com/purchase/
There is also the possibility to download a trial using the following link: http://www.cinexhd2.com/download/cinex-hd-utility/