Hello, we had previously set our thumbnail size to 300x200 and many thumbnails were generated. Now we want to set our thumbnails to 360x238. Is there a way to regenerate the old thumbnails into the new size? I saw in the changelog for 3.4.4 "Added system to re-generate medium sized and thumbnail images" but I do not know if this is related to what we want to do. Or how to do it, if it is possible. Any help will be appreciated! Thanks!