In iclone 7, you should press ctrl-1 or right click to change the thumbnail view mode. There is no reason to get rid of this feature, as it's very useful, as I have many folders where it's more useful to hunt for something by name as opposed to thumbnail.
In Iclone 7's scene browser it was much easier to hide every character or every camera, since it by default sorted them in an organized way. Now it seems to just order things by the time in which you added them into the file, and this makes no sense. A least allow us to sort by type, name, date, etc.