Just to note.  

At your step 5, Close Company/Logoff, I was presented with the option to rate quickbooks (would I recommend to a friend?).  When I went to click that interaction, I got the error (and did send to support with my email address attached).  I will now attempt to login with the new account.

errm.  Okay, I logged in.  The new features wizard popped up and when I went to click okay, the whole app just went away (no error dialog at all).  I will restart my pc and try this again.