You can activate Stellar Photo Recovery with the activation key provided upon completing the purchase.

To activate the software, perform the following steps:

Note: Make sure that you have an active Internet connection.

1. Launch Stellar Photo Recovery.

2. On the main user interface, click the Menu icon and select Settings.

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3. In the Advanced Settings windows, click Activation icon. A dialog box appears with two tabs: Online Activation and Offline Activation.

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4. Click Online Activation tab to continue. In the Online Activation window, type the Activation Key and click on Activate button.  

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4. You should now see the 'Stellar Photo Recovery Activated Successfully' message on your screen. Click OK.

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You can also watch a quick video tutorial of the process here: Watch Video