I don't quite know where the save files are located
Had the exact same map for my second mission, both Aliens in the exact same start positions and exact same bug (near enough same crash site). Auto saved before crash.
http://www.filedropper.com/saves
No Encounter (01 sep 11:24) is mid ground battle when replaying this I got a runtime error however I did not replay it to see it it would happen again.
Geoscape (01 sep 00:03) just before my first encounter, haven't played any maps other than arctic yet I replayed this save and encountered a ship over Africa so you may not encounter the same problem as I have only played two maps over northern Europe/western Russia.