To bad you're having problems. I use it myself and works. After you load the image you push "convert" ? This program generates a file.lua in the folder that you choose. Try to choose another folder, maybe the place is denied to save. Please, let me know if it works, and thank's for downloading!
Yes, OF COURSE I push 'convert'! How else would I know that it doesn't work? I've tried different directories, loaded different image files, converted files with and without 'compress' and 'transparency'... Nothing works. I've wasted enough time on this -- can I have a refund?