• VSCode 1.15.1
• OS win7 x64
• Shell 1.6.6
• Render 56.0.2924.87
• Nodejs 7.4.0

launch.json:

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "node",
            "request": "launch",
            "name": "Launch Program",
            "program": "${file}"
        }
    ]
}

Create a file name ： go.njs:

debugger;
console.log();

press F5 to debug throw: Cannot launch program ”xxx\js\go.njs“ setting the 'outFiles' attribute might help

But I rename that file extension name '.njs' to '.js', It works well.