Epson ES-580W Wireless Duplex Document Scanner - Manual (Page 106)

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You see a screen like this:
3. To purchase a new license key, click Purchase License Key .
The Epson support page opens in your web browser where you can purchase the license key. If you
already have a license key, go to step 4.
4. Make sure the scanner you want to activate the license key for is displayed at the top of the screen.
Click
Change if you want to select a different scanner.
5. Click Enter License Key .