I am a programmer who is working with a client's flash designers. Most of my client's personnel have CS3. I recently upgraded to CS5 due to another contract that I am working on for a different client. Will I be able to modify my CS3 designer's .fla file, save and hand back to them to finish designing?? Will they be able to open up my modified document?? Sorry, this is my first use of CS5 Flash.
You will be able to open and edit the files, but you can only save them as CS4 files, so you won't be able to return files they canb work on. You should be able to still have your old version of Flash installed even with the new one though.