Hi all, I am new to the Forum and hope some kind sole can give a 77 year old designer (the old school) from Leigh on Sea in Essex some helpful and constructive advice. I have a mini mac OS X and in the summer I was advised to installed Snow Leopard to improve performance, but since then when ever I try to open any of my Illustrator CS files it crashes! the CS has worked fine in the past. I have just bought Illustrator CS 4 from Amazon to overcome the problem, but when I installed the program I had to provide the Code for my original CS which I do not have or recall ever having ( I have had CS for years and was never made aware the code may be needed at a latter date!). The installed CS 4 is now only functional on a 30 trial. Question....what is the best advice to overcome the code problem. Can I buy an old CS with code and how will I know the code will work with the new CS 4 or can I buy a code for my existing CS and from where, or will I be forced to purchase a full CS 6 which for me and my limited skills is not only expensive but impractical for the small amount of Illustrator work I do!. Really appreciate any help on offer.