Locked out of Quicken 2011

I have Quicken 2011 and am very happy with it usually; however, I can’t use it as it won’t open the data file.  I get the window ‘Welcome to Quicken’ and I follow through the stage of ‘I am already a Quicken user.’  I cannot even open my last file saved or to open the backup on an external drive.

I received an email back from Reckon suggesting various things.  I have followed the instructions and now can't even open the programme.