Topic on Talk:Star Wars: Jedi Knight - Jedi Academy
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I'm pretty sure it's been tested; I'd have to check discussion on the Game Upscale Discord, as I don't have the game.
The "zips" are actually a single 7z archive, split into 3 files. Make sure they are all downloaded, then open the one with the .001
extension.
Regardless, it's a dead project, as both people working on it stopped doing so.