Question about restoring scaled images and import

Hello,
Yesterday I was moving around a few photos in my uploads folder with the ‘WordPress Media Library Folders’ plugin as they are in the wrong /year/mo/ folder relative to the actual upload date(they were uploaded directly to a post with the wrong publishing date set prior to WP 4.3). But I forgot to disable the “feature” that scales pictures over 2560px, which caused the first photo I moved to scale. Thankfully it’s just one photo, but is there any way to restore it to the original and remove the -scaled version and name without reuploading?

I’m in the process of exporting the site into a multisite network, and I’d like the full-size originals to get imported as well. I was planning on letting the new installation scale the current library, as long as the originals are there. Does the WordPress import plugin also import the original if the photo is scaled? I suppose that would solve the first question as well.

Thanks!