set up 2012 airport express base station
I have a 2012 Airport Express. I had my main imac computer "wiped" to remove something so am starting from scratch. It is connected to my main airport utility. my question is: How do I reconnect my airport express so I get wifi when using my macbook laptop in a remote part of my house again? Do I need to download an older application for this Airport Express 802.11n Wi-Fi? through itunes? Thank you for any help.
AirPort Express 802.11n (1st Gen), Mac OS X (10.7.5)