I'm using a macbook pro with Windows 7 on it. I downloaded it to my downloads folder and got Java but it doesn't work. I double click, click open when it says the publisher could not be verified, but nothing happens. This occurs with all the software, not just the Hardware Simulator. I already tried re-downloading and unzipping.
Thanks, J! I was having the same issue as Arthur, and was wondering why my (apparently not) updated Java wasn't cutting the mustard. Solved the issue handily!