Resizing images to square dimensions

The only problem I’ve noted with the plugin is that it changes the dimensions of images in the content. Many of my images are rectangular (book covers) and I wish to prevent the squaring of them.

My site is here.

I like the other features of the plugin, however, I need to resolve this to keep using it.

Any pointers?

Thanks in advance!

https://www.ads-software.com/plugins/images-lazyload-and-slideshow/