ARDI-360 is now web-based, meaning you can access your 360-degree photos from your web-browser.
Press the 360 button in the sidebar, or choose 360 Photo from the dashboard of any of your ARDI assets that appear in a photograph.
You can download the desktop clients from the download library, via the ARDI Online Store.
Check under Clients | 360 | Release for the latest official version.