Please follow the next steps in order to setup resizing and cropping correctly:
- Go to the plugin settings page.
- Set necessary size in the "Image size" option.
- Make sure you have "Crop Images" option marked. Then select the necessary position in the "Crop position" option.
- Save changes.
- Click "Update images" button on the plugin settings page, and wait for all images to get updated.
WordPress will create a copy of the thumbnail with the specified dimensions when you upload a new image.
Please note that "Crop images" option is available only in the Pro version and only images of custom size can be cropped.