I am still using Photshop CS3. I haven't found the need to upgrade since it works fine for my needs. However, it no longer works. This is the message I get: "Licensing for this product has stopped working" unistall and reinstall product, contact Adobe customer support for help.
Problem is, customer support doesn't exist when your product is this old, so I am stuck. I have the CS2 disk and did an online upgrade to CS3, all of which appear in my Adobe account.
I'm not sure how to unistall CS3 and then if I reinstall CS2 will it even work on my OS 10.7.5 system, and if it does how to I upgrade back to CS3?
You shouldn’t need to re-install CS2, just have the serial-number handy when you install CS3, so you can type both in—I assume this is how things worked back then, anyway.
If uninstalling and re-installing doesn’t fix licensing, perhaps you’d need to run the CSCleaner script before re-installing:
The Trial version can be downloaded here (provided you've got your serial number):
Enter your serial number(s) to convert it to a full version.
Note: Follow the Very Important Instructions on that page first otherwise the links will not work.