title: How to fix broken context sensitive help in IDE of Delphi 2010
body: <p>After working for quite some time, my D2010 help system broke.</p>
  
  <p>Highlighting a keyword like TStringList and hitting F1 results in the 
  message "No help found for context."</p>
  
  <p>Putting the cursor in a property field (like ModalResult) in the property 
  editor and hitting F1 shows an hourglass and that's all.</p>
  
  <p>Clicking on the IDE's main menu Help and then Delphi Help works. I 
  can type TStringList into the search field (in the Microsoft Document 
  Explorer that appears, loaded with "What's New - Embarcadero RAD Studio") 
  and get appropriate results.</p>
  
  <p>Anyone have any suggestions on how to fix this?</p>