Weird voodoo required to connect MGD

To successfully connect to my Note 5, I have to:

1. Run MGD

2. Try to connect

3. It will show an 'Error' entry in the list of android devices.

4. Quit MGD

5. In Task Manager, adb will start running as soon as MGD quits.

6. Re-run MGD

7. Try to connect again

8. Go to task manager and close the running instance of adb

9. MGD will now show my device properly and allow me to connect.

If I do anything in a different order - if I close adb before re-running MGD, for instance - I keep getting the 'Error' entry in the list of android devices.