What differentiates CinemaFocus from Lenscare, TinderBox2 and the "Blur (Lens)" filter of Photoshop CS?
The answer is simple - quality. Check for yourself using the Personal version. The superiority of CinemaFocus and its family has been recognized by many professional production groups such as Studio Dhibli, Square-Enix and major TV stations.

Can CinemaFocus be used with discreet combustion?
It actually seems so though this configuration is not supported by Sakurai Optical Lab. It is reported that with the Personal version get you an alert "ADM" but it should be no problem. Just ignore it and click OK when it appears. The alert does not appear in the Professional version. See Help files of CinemaFocus for more detail.