If you're having trouble removing the insty_connect_setup wifi network, click here.
1.) Click on the Advanced Config (geeky) button.
2.) Login using the router password. (The username should be root, and the password is the one you setup in the first step of the installation process).
3.) Navigate to Network -> Wireless
4.) Next to insty_connect_setup, click the 'Disable' button, then click 'Save and Apply' at the bottom.