Apologies for the site's problems lately; I don't have a good enough hosting provider for this site. A user contacted me about these problems, saying he could host it. I decided that that would be better. He has better hosting service and free time to maintain it. He said it would remain the same. He already set up a new domain ti89-simulator.com. I'm already transferring this domain to him, but it will take time. So, for now, please access it from his new site.