At this point in time you’ll probably have to buy the upgrade to the latest version, Photoshop 8 (also called CS), unless you can find a retailer (scour online vendors) that is still selling 7.0.1. Make sure you check the system requirements for Photoshop 8 to make sure your machine can run it.
Owners of Photoshop may upgrade to the latest version of Photoshop from any version, all the way back to version 1. If it’s 3.x or earlier, you’re required to contact Adobe Customer Service, because there are some special procedures one must follow.
Adobe Contact Info:
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http://www.adobe.com/support/service.html>