You can reset your activations from the "All My Downloads" page on this site.
We will be providing updates for CC 2015 soon (looks like next week). For now we are recommending users use CC 2014 if they need to use webassist extensions.
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.