Sorry for the delay, we don't monitor this forum on a daily basis. Whenever you have a problem, please use our forums here: http://www.codeflavors.com/codeflavors-forums/forum/featured-articles/ or send us a support ticket from your CodeFlavors account.
About images in slideshows, the size of images gets set by what sizes WordPress returns. When retrieving an image attached to a post/page based on image size set in slideshow settings, WordPress will return the image path along with image width and height. When displayed into a slideshow, the image will have the width and height parameters set on it for better page performance.
As a note, complete image HTML is returned from template function and displayed directly into the slideshow to make it easier to create themes for Featured Articles. Function can be found in common.php file from folder includes but I wouldn't suggest you make changes into that file since it's a core file that might get overwritten whenever you update the plugin.
Please let me know. Also, if you need help coding a theme, please post a support ticket on CodeFlavors and I'll do my best to help you in any way I can.