Thank you for the provided screenshot. According to it, you are using an old version of Adaxes while the instructions you referenced are only for the latest version of Adaxes. To activate your license key:
- Unzip the license.zip archive.
- Navigate to the folder where Adaxes service is installed, which is C:\Program Files\Softerra\Adaxes 3\Service by default.
- Open the License folder.
- Copy your license key file (license.admlic) to the folder.
- Restart Adaxes service.
Note: If you have multiple instances of Adaxes service sharing common configuration, activate your license key for each instance.