Excellent find!
It seems I've accidentally packed the contrib with the wrong file.My local copy was working just fine and I even tested on a clean install and it worked so I assumed it's something on your end. But, you got me thinking so I downloaded the plugin and it turned out you were right! Thank you!
The updated version has been submitted. If anyone else has the same problem, the only changes have been made to includes/templates/YOUR_TEMPLATE/templates/zx_slideshow.php so that's the only file you'll need to replace (after version 2.0.1 is approved and available).
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