Thanks for the details.
The current released versions of the mod loader are for Godot 3.5. WindowKill is created with a custom build of Godot 4.2. The creator of the game released the custom engine build used here:
https://github.com/torcado194/godot/tree/windowkill
There is a post on the Godot Discord Showcase, you can follow that for a bit more information.
Regarding the zip downloading, that's a good point. We should add a zip to the release that can be used for the self-setup.
The .gitattributes file prevents the download of some setup files since we can't include them for the asset lib version. The only way to obtain all files is to clone the repo.
Originally posted by @KANAjetzt in https://github.com/GodotModding/godot-mod-loader/issues/356#issuecomment-1830635025