If you have not downloaded your add–on already, log into your Pixelobject shop account and click the Download history tab. Click the download link in the Files column to download the add–on.
Zip the downloaded files then navigate to Plugins ➝ Add New ➝ Upload Plugin within your WordPress admin dashboard and upload the zip file.
Once add–on has been successfully installed, click Activate Plugin.
Alternatively, if you’re an IT wizard, you can add the unzipped theme folder via FTP to the /wp-content/plugins/ directory of your WordPress install