recently deactivated and then wiped my computer to put a new OS on it. I have my serial number, haven't been able to find my disc for photoshop cs4 extended. all the downloads I've found only link to the photoshop cs4 standard edition.
As I understand it, there's one download for CS4 Standalone.
The serial number you enter will determine whether the CS4 Standard or CS4 Extended feature set is unlocked.
Also if the serial you have is for an upgrade from some prior Photoshop version you will need one of your prior serials number as well it can be for any prior Photoshop version full or upgrade serial. Find your serial number
I was eventually able to find the disc. so should be ok.