Tried to open a .dwf created in autodesk design review 2012 with autodesk design review 2013, but
it will not open in either version and gives the following error: "Your current version of Design Review
does not support files of this type". I tried changing filetype to .ZIP and open, but would not open.
Any ideas on how to get this file open? It opened fine for a week or so after it was created in ADR 2012,
but now will not open in ADR 2012 or 2013.