I don't know if anyone has this problem, but the textures/shape of the galaxies are missing. They all have a similar color and shape. I spawned all the galaxies (Andromeda, Pinwheel, M 32, etc), and each galaxy is just labeled "not named." Oddly enough, the shape of the galaxies and colors are normal in the "Galaxy Collision" simulation.
I used the search function and didn't see any results that were similar to what I am experiencing, so I thought I'd put this out there (or am I mistaken).
As a side note, I tried spawning an extra galaxy within the collision simulation, but the same result happens.
Here is a screen shot of what the galaxies look like to me.