generate --setup gives "Error: undefined" on windows 10 ?

[StefH]

C:\Windows\system32>npm install -g generator
npm WARN deprecated minimatch@0.2.14: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
C:\Users\Stef\AppData\Roaming\npm\generate -> C:\Users\Stef\AppData\Roaming\npm\node_modules\generator\bin\index.js
C:\Users\Stef\AppData\Roaming\npm\generator -> C:\Users\Stef\AppData\Roaming\npm\node_modules\generator\bin\index.js
C:\Users\Stef\AppData\Roaming\npm
`-- generator@1.0.1

C:\Windows\system32>generate --setup
Error: undefined