I am using Magazine Basic (not your theme so not looking for support for the theme itself).
I changed some images thumbnail sizes to better fit the layout and need to re-Smush my images. How do I get Smush to take note of the new thumbnail sizes and redo the images? Smush can see the thumbnail sizes the theme sets, and shows what size they should be, but old images are the old size. Newly uploaded files are correctly sized.