OK. Thinking some people are visual and not everyone speaks the same language. Spent 5 minutes and went through the Wifi setup on my machine. Quick, unedited video.
The unboxing instructions send you to setup.glowforge.com. That link is preferred so you can follow the complete setup process and name your Glowforge. It includes the Wifi setup process. But if you are simply having problems with Wifi or want to change Wifi connections you can go to Glowforge - the 3D laser printer as I show in the video.
After the setup process is complete you go to app.glowforge.com to start your first print.