Actually, I think the issues always coincide with OS X or Adobe updates. I just downgraded my Dreamweaver from CC to CS6 and I'll downgrade the OSX to Yosemite tomorrow to try using CC with Web Assist.
For the time being, IT IS WORKING RIGHT NOW FOR THE FIRST TIME ! I'm SO HAPPY about this. I've removed all config folders, stripped Dreamweaver and followed every item you've had listed in your site and Web Assist is working for the first time since I purchased the entire line.
It has crashed once however I'm on El Capitan and using CS6 so I expect some issues as it is downgraded. I'm excited to use this on Yosemite tomorrow! I'm Finishing up a project I've struggled with for a long while now, I'm able to connect to remote databases with MySQLi and build data assist pages in the wizard, this makes development so much quicker ! YAY !