I am trying to make changes on an owner's manual and after a brief amount of time, InDesign locks up. It shows a blank page no matter what page I'm on and when I finally give up and go to force quit (command-option-escape) the dialog does not list inDesign as not responding. I am under the gun on this project and would appreciate any feedback. I have tried to work with other documents to see if it's just this document but the same thing happens. I have an older version of inDesign (CS 5) and it works quite well but this document was created in CC 2014 and I can't open it in earlier versions.