Probably should of just kept to the topic, but I'll give it a shot. First, open up your Aion client. You should have 3 files: Sensor.dll, Sensor.exe, and Sensor.ini. Once Aion is open run Sensor.exe and three settings should pop up on the upper right-hand corner of the screen. This is the menu, and from here you can toggle 2D radar and change settings, turn on 3D ESP, etc.
Sensor doesn't work on XP or lower and is only built for 2.1 (Current official server patch)