Need images to have more depth (and show more of image) on 'Timeline Express' plugin

Hi, I am having an issue where this plugin (timeline express) is presenting some of the images with not enough depth to the extent that the majority of the pic is being cut off the top and bottom. I need to show more of the image but the plugin is creating an image at this size and using it in some cases but not others? (see screenshot)

Could you take a look for me and get the plugin to pull in the full image or at least one that shows more of the shot?

Many thanks