Hi Daisy606, latest update20120730 has not bluetooth support, so you can't find any option to make it working.I have plugged in a bluetooth dongle to my ATV2000 (updated to 20120730) and the light has come on but I can't find out how to enable it.
I'm trying to find a wii remote in MD.emu but it says 'bluetooth not accessible'.
You should install previous firmwares as: update20120420 (ICS) or update20120606 (GB)
which, both of them, support bluetooth connection.
I have tested, successfully, a bluetooth dongle "made in china" (not branded) and, installing
Bluetooth File Transfer.apk from Play Store, I was able to connect my phone to ATV1000.
This is my BT dongle:
Be careful that, not all BT dongles work but only those ones which have also specific drivers for linux/android.