Yes, to install DMX zone updates, you need to first remove the WebAssist extensions
We have released a hot fix to eCart 6.0.5 recently to correct this conflict and will be updating the rest of our extensions very soon.
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.