Official website: https://www.duplicatephotocleaner.com/
FAQ (scroll down): https://www.duplicatephotocleaner.com/support
- Right-click the installer and choose Run as administrator.
- Click Install.
- After the installation is complete, launch the software.
- Click Register now in the bottom left corner.
- Then choose “I have a license key”, and enter the email and your license key. Click Continue.