Hello,
First of all, thank you for your purchase.
When resizing images, the plugin will keep their aspect ratio, to not make images look bad after resizing.
To solve the issue from your front page, you need to contact the support of your current theme and ask them to customize the theme for you, so it displays images in a standard size (and will not display them in different sizes if they are in different aspect ratios.
Also, a freelancer with CSS skill is able to do this job.
I am sorry that I cannot help, but the aspect ratio keeping of images is a requirement, as if I would remove this, the images would be greatly distorted after resizing and they would not look good at all. Thank you for your understanding on this.
Regards, Szabi – CodeRevolution.