I have a feeling that you would be talking about its use for browsing images already loaded to the PC ... I'm wondering if it's any use in comparison to Camera Control Pro when using a tethered or WIFI connected camera. ... Particularly in letting your client see the images as you work
If your wanting to view images that are in camera then Camera Control makes Thumbnail Selector redundant, if you want to show images to your clients while shooting tethered then a better way would be to download the images to the PC as you shoot and use View to display them in full screen mode.