Based on my understanding this project is on hold. I could not find anyone still working on it. I made a mod mod version of it for a bunch of friends to do multiplayer but that is about it. I fixed mainly some balance issues with the later game. No real crash bugs though, surprisingly enough I have not had any bugs that crash the game in the 10+ multiplayer games I have played.
If you wanna recover your save there are a couple of things you can do. If you start up fireturner and then start the game. Once it crashes check fireturner (Civ 5 SDK, tools in steam) for any runtime errors. Post it here if you see any. The other option is load the mod with the IGE and start delete AI cities/units for whichever AI it crashes on, in a effort to figure out what unit/city is causing the crash.