Visual Studio 2010 does not reload open files

Question

Prior to today, if I quit VS2010 and reopened it, my previously opened solution was loaded and any previously opened files were reloaded and displayed in their correct posit

Answer 1

To confirm answers that HiredMind and valverij have contributed - I opened a previously exported settings file in VS 2013, executed Edit -> Advanced -> Format Document, then searched for and deleted all of the ViewBookmark tags where ViewBookmarkType="DocumentWell". I then saved, closed and imported that settings file. It worked! VS now (again) reopens the previously opened documents when I open a solution. Thanks.