Answered
Have you tried this KB article, specifically the re-create user folder: https://helpx.adobe.com/dreamweaver/kb/troubleshoot-javascript-errors-dreamweaver-cs6-cc.html ? If that doesn't work, you could try re-installing, or if that is still not working, the last resort is to try another user account on your computer and if the error is not persistent there it could be an issue of a corrupt OS user profile in which case you would need to migrate to a new user account.
