When the install finished, the icon on his desktop wasn't the familiar Unity cube. It was a perfect, rotating sphere of static.
For engineers without an active subscription, contacting a Schneider Electric distributor (e.g., Rexel, Graybar, Wesco) is the fastest route. Provide: Unity Pro 13.1 Download
Note: Licensing for Unity Pro requires a paid subscription or perpetual license. If you don’t see the Pro option in Hub, check your Unity account entitlements or contact your sales/admin. Unity Pro 13