Hi there
I can't see that from work, but I think I vaguely remember somebody with a "green" issue in the past. There are a few first steps to go through to see if you can get it working:
- Make sure you've upgraded to your most recent video card drivers
- Look in the log file under "/logs" and see if there are any errors (or just attach the whole thing / paste it online somewhere)
- List your computer specs here (Windows or other OS, video card name, memory)
We don't have the best performance/support on older machines at the moment, that's usually the issue. But we hit the odd issue with newer more powerful machines now and then, often on Linux.