Thumbnail alignment

Hello,
I’m using the pro version. Total of 8 thumbnails in slider, 5 appear on page at once. At the moment the slider displays the middle thumbnails (no. 3,4,5,6,7) by default, meaning i have to scroll to the left to see see the first thumbnail. I would like thumbnails 1,2,3,4,5 (starting from the left) to display by default.
Thanks for your help

https://ww.wp.xz.cn/plugins/wp-responsive-thumbnail-slider/