Feel free to shoot me down Dan if I am misunderstanding your issue.
Is the issue that when you try to log back in, it states that the program is already running? If yes I am having it also. I have to kill it from the Task Manager and then start AC again. There are two options in AC I see to get out, Logout and Quit. This happens when I choose Quit and Angels told me to use logout when walking out of the exam room and log back in. What is the Quit for then?