If you missed the flash, or you just want to be sure that you got it right, follow these steps to confirm that the reset was successful.
- Reconnect the router to the computer with your Ethernet cable. (That's the one that you just disconnected above)
- Turn the computer back on.
- Open the web browser of your choice.
- Use your URL bar to navigate to 192.168.2.1. This page will show you the settings for you router. If you have done the reset correctly then you will notice that all of your settings are back to their default state.
There you have it, a simple way to double check.