If you contact the sales department at sales[at]webassist[dot]com, they will be able to get you the upgrade price for any additional licenses.
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.