I've heard of this before. It's related to the Kozai mechanism. I have not yet simulated it for binary stars, but on the "Simulations" link there is an article called "Kozai Mechanism". It shows 2 examples with Gravity Simulator. The first places the Moon in a circular polar orbit around Earth. All seems fine for a few orbits, but then eccentricity is pumped into the Moon's orbit. Within a decade, its perigee is below the surface of the Earth
The next example doesn't actually simulate the effect, but shows what is theorized to be caused by the effect. The jovian system of moons contains no moons with inclinations above about 60 degrees. The reasoning... If they existed, the Kozai mechanism would pump eccentricity into them until their perijoves were in the vicinity of the Galilean Moons. Then their days are seriously numbered (think 5-planet system

).
Comparing a binary star system to the Earth / Moon simulation, the two stars are analgous to the Sun / Earth, and the planet is analgous to the Moon. There's no reason Gravity Simulator shouldn't be able to handle this, although the time scale required to see results may be very long.
Notice in this simulation that it takes a while for the action to begin. The Moon orbits the Earth normally for several orbits before you notice any significant eccentricity develop. But once it does, the rate accelerates.