I've just purchased the Noir Filter for Carrara 5 and installed it.  Can anyone who has experience with that filter explain to me how to just make my character's eyes color and the rest of the scene B & W.  I'm not really understanding how to use it from what litereture I've read.

Although I just bought the filter last night, I received an email this morning saying there was an update.  Could this be the same version I downloaded from the site last night, or a different version?  Should I download the "update" and if I do can I just unzip it to the right folder and overwrite the older version?