In CS6 I down saved an InDesign file created in CS5, to CS4. For some reason I did not have the option to down save to CS5 from CS6. Now I cannot open the file in CS6 or CS5. I get an error message that says "Cannot open the file. Adobe ID may not support the file format, a plug in that supports teh file format may be missing, or the file may be open in another application. I know that the CS6 files are .indd and that CS4 and lower are .indl, is there a way for me to revert back to .indd?
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