I believe trial version of Extension Builder is bundled with corrupt CC Ai HostAdapter
Also, there are problems with inDesign host adapters - include it, and extension won't compile
Yep, the CC AI Host Adapter from the licensed Extension Builder seems to work. Our Extension is limited to Illustrator, but thanks for the InDesign heads-up.
Update: After further investigation, The licensed Extension Builder's version of the CC AI Host Adapter for Windows works, but the Mac version still does not work (i.e., "AIHostAdapater.pingPlugIn()" still results in the "pingTimedOut" event)
For someone facing loading issues of AIHostAdapter plugin in CC2014, you can download the same from the following URL