Converting Old Audio Project Files in EMC 7 / 7.5 - Audio Posted January 16, 2006 · Report reply Unfortunately, Roxio has never "looked back" when coming out with new versions. ECDC 4 couldn't open .CL3 files. ECDC 5 could briefly open .CL4 files, but that went away with one of the updates... and so on. Your best bet is if you created Jewel Cases for these discs and still have the .JWL files, which may open in Label Creator, or ECDC 5 coexists just fine with EMC 7/7.5 so you could reload that to open the files. Hope that helps!