LaSSI (the Last Starship Save Inspector) is a free, open source, cross-platform, fan-made tool for inspecting and editing save files for "The Last Starship" by Introversion Software (https://www.introversion.co.uk/introversion/). Cross-platform UI made possible by Eto (https://github.com/picoe/Eto)
Comparing saves side-by-side would be really helpful. Might not be as bad as I think it'll be, but it might be.
Probably ought to devise a more traditional, straightforward diff tool as well.