[Smush Pro] Missing directory to smush

I've ran the bulk smush on my website and Google Page Speed Insights now shows less images that need optimising. However it is still showing that I need to do a lot of images in my 2017 uploads directory. I have clicked the recheck-images button but Smush says that everything is done and up to date. I also have the "smush my original full size images" option set but that doesn't make a difference. I've also looked for that directory under 'Directory Smush' but it doesn't appear. Can you help please?