Activating the .js

Brilliant plugin! What I’ve been waiting for. However I’d like to edit the style of the desktop lightbox. I’ve edited as much as I can through the css but certain things like opacity of the overlay require editing the .js – which is inactive. Being fairly new to all this my question is how do I activate the .js to implement the changes I have made?

Thanks in advance. Again … fantastic plugin.

http://ww.wp.xz.cn/extend/plugins/tablet-photography/