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In short, the task is: using Paint.NET or another program (if needed), create new icons for a new unit (replacing an old one). The problem is that you can't save changes to the old icons, and if you "save as," the game doesn't recognize them properly (pixels/broken image - corrupted). In some cases, the game crashes when trying to display this image, so I have to "revert" and restore everything to how it was. I would appreciate any help.