You will only need site assist professional installed if you have sites that where created using that tool that you still need to manage.. If not, then you can uninstall Site Assist profesional and just use site sculptor.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.