tools page missing all options other than 2 blue buttons

trying to get all category images on the linked page to display in the identical height without cropping and without undesirable disproportionate skewing and assuming this plugin is intended for that. however, after installing the plugin and checking the tools section, there are only 2 buttons as options, 1 reads “regenerate thumbnails for all 534 attachments and the other that reads “regenerate thumbnails for the 286 featured images only”. don’t see the options for desired thumbnail sizes etc. FYI not sure how to insert a screenshot into this post from a jpg image found on my hard drive. i only see options for inserting images from a url.

The page I need help with: [log in to see the link]