[Plugin: WP Image Borders] excluding an image

Hi all, new to wordpress and have used the above plugin to make all my site images look a little nicer. Unfortunatley the options I have used are global and have been applied to my logo and to overlay images on my slider. Is there a way to exclude or just include specific images? I think the answer is in the css classes but I dont really know how to identify what class each image is associated with.

Any help would be much appreciated.