Hello, you can't just open it in last godot version, it is just for custom godot binaries. To use it, you just need download this project and copy the godot.exe to new directory and open like normal godot binaries.
I already sucesfully compiled binaries of Godot 4.4 for windows 64 bits, without c#. I restarted work last month and faced the new sdl3 input system incompatible with my project. But i will re write it to compile for godot 4.5