When you first start vMix after installation, it contacts StudioCoast’s servers to register the start of your trial. The server records your hardware ID and the date. Even if you wipe your entire hard drive and reinstall Windows, the server knows that hardware ID already used a trial.
After the 60 days expire, the software enters a “View Only” mode. You can still open projects and watch previews, but you cannot: Vmix Trial Reset