Just tried to use IGC Flight Replay and had errors.
Looked on the Flight Replay website, found the news.
http://ywtw.de/igcsimen.html
15.01.2017 Unfortunately Google does not support the interface to Google Earth anymore. Therefore for the time being IGC Replay will not be offered anymore. I Hope you had a lot of fun with IGC Replay.
We'll see if it can be fixed.
Jim