Crash was in two cases:
1)After map was loaded completely and my turn just started.
2)After my turn, during aliens first turn.
I have updated version and, yes, no more problem, (woo-hoo!). I have played some maps (in campaign and single battle). And I'v checked up a save file which always led to a crash. Didn't see anything wrong. Works fine.
I want to say, thank you very much, guys.
Not just for solving this bug and your replies, thank you for your great work. UFO AI is the best x-com-style game, i think. I remember old times, when a lot of my time was eaten by classic x-com. And you made not just a game, you made the real time machine. You granted me (not just me, of course) a lost feelings from childhood. When computers was bigger and did not exist any Windows. ^__^
Thanks one more time for your attention.