You can download Jwno executable files from Github, or purchase it from itch.io. You get the exact same executable files either way.
Just grab jwno.exe and you are good to go. It can be saved to anywhere in your disks. Jwno.exp and jwno.lib are for developing native modules, we don't need them just yet.
You may optionally check the checksum of jwno.exe. For example, calculate it in Powershell:
$(CertUtil -hashfile path\to\jwno.exe SHA256)[1]And then compare it with the value stored in jwno.exe.sha256.