InDesign cannot open ZIP, only IDML, even if IDML is a flair of ZIP and can be unzipped.
CS4 should be able to open any IDML file which is not corrupted.
InDesign cannot open ZIP, only IDML, even if IDML is a flair of ZIP and can be unzipped.
CS4 should be able to open any IDML file which is not corrupted.