Load Cronus PRO and go to Tools > Options > Device
Set the Output Protocol to XB360.
These are also the recommended default Speed Up Settings for Wireless Xbox 360 Controllers. Rumble Over Bluetooth is disabled as it's not being used.
You can now close the Options window and disconnect your CronusMAX PLUS from the PC.
If you have previously performed the above step, Simply press the Guide button on your Xbox 360 controller.
The LED on the controller should start blinking, meaning the controller is tying to connect with the CronusMAX PLUS/Wireless Receiver.