Below is a step by step guide on how to configure a UniFi Access Point using the Unifi Controller Software.
Head to the link below, scroll down to the Software section, find and download the latest version of the software for your platfrom (Windows, Linux and macOS):
Once downloaded run the UniFi-installer.exe.
Leave the "Start UniFi Controller after installation" tick box ticked.
The UniFi Controller Launch Box will appear.
Click "Launch a Browser to Manage the Network".
This will then launch the following browser, click "Advanced".
Click "Proceed to localhost (unsafe)".
Run through the UniFi wizard.
Give your controller a name and click "Next".
If you have a Ubiquiti cloud account you can use this to sign in (or register an account here https://account.ubnt.com/register).
If you do not want to setup Ubiquiti cloud account, click "Switch to Advanced Setup".
Turn off "Enable Cloud Access" and "Use your Ubiquiti account for local access".
Add a username, password and email address and click "Next".
Click "Next" again.
Create a "WiFi Name" (SSID) and "WiFi Password".
Enable "Combine 2 GHz and 5 GHz WiFi Network Names into one" and click "Next".
If you have a UniFi Access Point connected to the same LAN as this controller then the it should show in here. Select all devices you would like to add to the controller and click "Next".
Below is dashboard.
If you would like to add a wireless network or change your existing wireless network, click the cog in the bottom left hand corner. Click "Wireless Networks" and then either select your existing wireless network or click "+ CREATE NEW WIRELESS NETWORK'.