How can I shuffle images in HOT Joomla Gallery?

Hi,
I saw that it could be possible, since in Hot Joomla Gallery Usage Instructions you can read:
"•SHUFFLE IMAGES: Select whether to randomize images order or not."
Now, maybe I'm dummy, but I can't find this option.
Could you halp me?
Thanks a lot for your patience

Open:

modules\mod_hot_joomla_gallery\tmpl\default.php

line 52:

shuffle: false,

change to:

shuffle: true,

Thank you very much. It works!