Rational Acoustics offers legacy upgrade pricing. If you "find" a v6 iLok, you can verify it by contacting support. They will confirm if the iLok ID is legitimate. Once verified, they often allow a discounted upgrade to Smaart Suite (the modern version). This is the safest route to "verify" your v6 status.
The Legacy of Precision: Smaart v6 and the Evolution of Real-Time Acoustic Analysis smaart v6 software verified
If you have a legacy license file ( .ilok ), you can verify your v6 software by running it inside a Windows 7 Virtual Machine (VMware or VirtualBox). This isolates the software from modern USB power management issues. A "verified" VM setup is often more stable than a native Windows 11 install. Rational Acoustics offers legacy upgrade pricing