Missing Features

The features list says it will perform a benchmark on "...primary or selected disk…". I bought this to do a benchmark on an external drive. No dice!!! Theres no way (as far as I can tell) how to select any drive - the main drive seems to be selected by default. Theres no users manual, in the app or on the website. Something tells me the advertised description of this app is for the Windows version, not the Mac version. Id like to get my money back.

Bobs iTunes Account about Novabench