Edimax EW-7478AC User Manual page 27

4.
Select the Wi-Fi network name (SSID) which you wish to connect to and
click "Next" to continue.
If the Wi-Fi network you wish to connect to does not appear, try
clicking "Refresh".
To connect to a hidden SSID, check the "Setup extender manually"
box and enter the details manually on the next page, as shown
below.