@jelin1984 You can try to follow this https://blog.nem.io/ncc-to-nanowallet-export/. Upgrade works for me, should work for you too.
@KloNEM No need for a local webserver, you can click on start.html and it will open in your browser. Everything is client side, it does not expect any port or else for creating wallets.
Are you using latest version ? Can you open the browser console, try to create a private key wallet and look if you see any red error message.
Don’t paste console content here, send it to me via PM.

