Aug 29, 2009
After installing Snow Leopard all my CS4 applications displayed the same error dialog above. So I went through the gruesome task of re-installing CS4 and I still got the same error. Even running the Adobe License Recovery utility several times (with several reboots) didn’t solve the issue. It was driving me mad! Fortunately, thanks to a reply to a post in another blog that it was solved.
Here’s how. I had to delete the following folder:
When I launched Photoshop it asked me for my serial number and once entered, all the CS4 applications worked perfectly.