The extensions are not currently compatible. We will be working on an update, but in the mean time you will have to install DW CC 2014 or earlier to work with 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.