Just leaving this here to say I came to the forum in complete frustration with Hazel. Made myself read "Troubleshooting" post carefully. The log and the Preview helped me see what was wrong. A win, a win. Thanks!
It would have saved me LOTS of frustration with Hazel if the Troubleshooting info at the top of this Forum were also in the Manual. I showed a geeky friend both the Preview and logs and she was like, "OH That's why Hazel isn't running"