I had been designing a new course for about two hours and had made pretty substantial progress. I wanted to paint a section of cobblestone over some grass, but realized when I went to paint that I hadn't selected cobblestone as one of my textures. So, I backed out of the terrain editor and- to my surprise- all of the objects remained dark, as they appear when editing terrain. I re-opened and closed the terrain editor hoping that would fix the issue, but it did not. I can find no way to re-open the object editor. The undo button also does not help. None of the keyboard shortcuts have any effect, as far as I can tell. Therefore, I seem to be unable to add anything else to the course.

Do you have any suggestions? I will send a log to your support email.