Process to update theme

Hi, I needed to update this theme from 1.2 to v2.0 and its really unfortunate that it doesn't appear to be able to do it through the WordPress Updates page. The update through this interface fails to find the update file. I logged in and found that you can use the Catch Web Tools plugin but again installed that and activated the update component but again couldn't update. Updating manually is really not a nice process. Did I miss something or is this the way CT themes work?