I have the same problem one machine (2nd one) and another problem on another machine (main one).
executing onmousedown on wadatabridge_serhtm
Line 1900 on file
C:\users\username\appdata\roaming\adobe\dreamweaver cc 2014\ja_jp\configuration\shared\webassist\library\wa_ui.js".
retVal has no properties
also, ecart has the same problems with both machines.
I reset the activation but no help.