Add images using the "Add Images" Button (1)
Add multiple images within a directory using the "Add Images From Directory Button" (2A) with the option of adding image from sub-directories (2B)
To remove select images hit the "Remove Select Images" Button (3A) which will change the selection mode to multi select and allow you to select the images you want to remove. Once you're done hit the same button which has changed to a green check mark to confirm and delete the selected images.
To remove all images click the "Remove All" button (3B) to remove all images from the list.
You can have Batch Image Converter: (4)
To Rename your images check the "Rename" Check Box and type in the new name in the new Textbox that appears (5)
To Resize your images check the "Resize" Check Box and type in the Width and Height in that order in the two number boxes that appear (6)
Use the "Extension" Combo Box (7) to select the preferred extension you want to convert to
Finally use the "Browse" Button (8) to select the directory you want Batch Image Converter to save your converted images to
Your selected images that you want converted are listed in the box at the bottom left (9)
The box at the top right will show you a preview of the selected image in the list (10)