maybe the program has to work through too much data because you guys downloaded too many additional stars or set the discovery level too low regarding magnitude?
the program has to compute every object's position anew every so often, I think. the more it has to compute, the more errors in memory allocation can occur.
if it does not free the allocated memory for a past computation it will eventually hang.
less stars = less allocation hangs.
also: full view will likely cause a hang sooner than non-full screen.
or for example, in the SolarSystem Editor, you can reset the included comet view and stuff by clicking the button in that window ("reset..").
ease the load.
just a thought.
