I recently reported a Dragon profile from another computer, and then tried to add a new dictation source (a new Dragon Bluetooth headset). Initially it worked. However, the next time I try to use Dragon, would not let me enable microphone (just annoying audio feedback and no error messages to give a clue as to what the problem is), and the options to manage dictation sources were greyed out.
I found this thread on removing dictation sources for an older version of dragon. Moving a few dictation sources by deleting the appropriate folders did seem to work.