Good question, you are doing it completely backwards. 🙂 so it's good you are asking.
The correct process is shutdown the AA+ from the ASIAir app, wait until it beeps on AA device and the app closes on your phone/tablet. Then wait an few extra seconds and power the AA off by the switch on the box.. it's that simple.
Do NOT disconnect anything until it's powered off as described above. do no use any software switches to turn off components... simply just shutdown as described above. Now you can physically disassemble everything.
Next time, do the reverse, reassemble fully, then power on mount and the last thing to turn on is the AA+.
everything will work, be remembered and establish connections again exactly like how you shut it down.