It stopped working for me also. But I had been using the overlay without an API Key - I wasn't registered with Google and left the API Key setting blank in the TS2014 Setup. So I tried registering with Google, getting a key, and entering it in the TS2014 Setup. Now the Google Maps Overlay is working.
So for me, to get it working, I had to switch from an anonymous user to a registered user.
The procedure is outlined here:
http://www.trainsimulatornews.com/2013/ ... train.html Google has changed a couple of things. Look for 'Credentials' , ' Create New Key', 'Browser Key', leave the form empty and click 'Create'.
FYI
Wayne