Autocad Architecture 2011 shuts down as soon as I open it. It installed well. It initially asked me some "migrating the file" question, that I answered "YES". I had Autocad architecture 2012 and Autocad 2011 already installed on my pc. Upon facing the problem, I uninstalled ALL 3 products and now just installed Autocad architecture 2011. It is still giving me trouble and closes as I open it.