I have CS, CS2, CS3 and CS4 installed on my machine. Unlike you, I have clients who only have CS2 (for example) and so documents from them that need me to work on them need to be opened in the appropriate version. Thank heavens (or whoever) for Rorohiko’s Soxy. It makes opening the appropriate version very simple. I have no connection with Rorohiko other than being a satisfied customer.
I did find at one stage, when I needed to replace my hard drive and so needed to reinstall all sorts of things, that CS4 needed to have CS3 already there, CS3 needed to have CS2 and so on. Each had been purchased as an upgrade and so needed to have either the actual software on board or, alternatively, the serial number. I’m just glad I hung onto the original packages! It is something to bear in mind when you are contemplating deleting stuff from your hard drive.
So far, so good, but lately I have struck a frustrating problem and have no idea what to do about it . . .
When I try to launch CS2, it asks me for my serial number. When I type in the serial number (copied carefully and accurately from the original DVD cover) it rejects it as an invalid serial number. Aaargh! Where do I go from here? Because I don’t live in the USA, to contact Adobe (even if I dial the local number for Adobe) I must do it during USA West Coast business hours. For me that means at some awful hour in the middle of the night!
But, until I get it sorted, I can’t do any work for clients tat are still using CS2. So why don’t they upgrade? I guess for the same reason that I haven’t yet upgraded to CS5 — it costs more to upgrade than it is (currently) worth to me.