Enter the serial number for the software you purchased in the serialization screen.The serialization screen will load the first time you launch the application.You can enter a serial number for the application itself or a serial number for any Creative Suite that contains the application. If the product you purchased is one of the Creative Suites, you can enter the serial number in any of the applications contained in the Creative Suite.Other applications installed as part of the same Creative Suite will recognize the new serial number the next time the applications are launched.
Adobe Photoshop CS5 is the basic version, and CS5 Extended is an upgrade of Adobe Photoshop CS5. Adobe Photoshop has no 3-D effects, but the CS5 Extended has the 3-D effects. Adobe Photoshop CS5 is cheaper than CS5 Extended. Adobe Photoshop CS5 has basic needed tools, but CS5 Extended has some extra tools like Mixer Brush and many more.
Only applications running as a trial will recognize the new serial number.If any of the applications have already been serialized with a different serial number, they will continue to use that serial number until you remove the older serial number using Help > Deactivate > Deactivate Permanently.After selecting this option, they will recognize the new serial number on the next launch of the application.
The serial number you purchased is for the use of the software in a specific language, and will only be accepted by a product installed in that language.