I am using Flash CS4. A client sent me a couple of flash files and I cannot open them. I am getting Unexpected File Format error. I am able to open other CS5 files in CS4, so I don't think that is the problem.
I have tried the WinRAR method but that's not working.
I am wondering if the files are corrupted.
Does anyone have any experience with this situation?
It is doubtful that you can open anything greater than CS4 files in CS4, unless they were saved as CS4 files in CS5 or CS5.5. You should download the trial version of CS6 and see if the problem remains... if not, then you have 30 days to deal with the files and to decide whether you want to upgrade.
I had the same idea. I downloaded a trial version of CS6 and the files opened.