After somewhat less than 50 moves, the Victory window came up, presumably because the AI opponents had been killed by trolls, since I certainly hadn't done it. After clicking, I was then presented with the menu for New Game, Load Game, etc. Continue Game was one of the available options, so I clicked on that.
I was then taken back to the game, but the next turn button was greyed out, and it was impossible to continue playing.
I suggest that after a victory either the "Continue Game" button should not be available, or that you be allowed to continue wandering about, building your cities, whatever.
