You can continue to use it Dave since you already own it. It just wont be available for sale anymore or included as part of the Supper suite. Nor will it be updated for new version of DW though it currently works in DW CS3 - CS5.x
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.