Hi, I just got Universe Sandbox on Steam today. As an amateur sci-fi writer / astrophysics enthusiast, this program is a godsend to me! However, when trying to save a simulation of a solar system I've created I get a message that says "Error Writing File" and it won't save my simulation. This only happens after the first save and I'm curious as to whether I am doing something that makes the simulation unsavable. Has anyone else had this problem. This program really helps me visualize the fictional solar systems I've created and I'd love to keep using it for that purpose.