Cyclone Slider 2 Thumbnails not clickable

Hello,
I am having a issue with the thumbnail theme.

The thumbnails below the main picture are not responding when I click on them. The mouse pointer changes to a finger to indicate that the thumbnail is clickable, but nothing happens when I click directly on the thumbnails. I assume that if the thumbnail is clicked the large, main image “jumps” to and displays that clicked thumbnail

Also, how do I make the thumbnails larger in size, and not blurry. I was able to make them big using CSS but the thumbnail picture turns out blurry.

Thanks for any help!

https://wordpress.org/plugins/cyclone-slider-2/