Thank you to the mod author who responded quickly and kindly to my PM...turns out I only needed a minor security setting adjusted on my PC! I am still getting "no mood" and an empty drop-down when on the "new posts" page, but we can live with that. So if anyone else has installed, can change moods from the admin panel, sees text mood names but can't click within the dropdown, check your Java and security settings!
Also, for anyone interested in a different style of moods, I found this wonderful
set of mood bears that I am using. They are perfect for family-friendly and/or Christian sites!