If you have the original disc sleeve or box, the 24-digit serial number is usually located on a sticker on the back of the DVD case. What to Do If You Don't Have a Key
Are you trying to from an old version, or are you just looking for a solid audio editor for a new project? adobe audition cs5 5 serial number free
If you already own a legitimate copy of CS5.5 but lost your key, there are a couple of ways to retrieve it: If you have the original disc sleeve or