DVS Pro is an annual subscription. When you upgrade a perpetual DVS licence (Single Machine or Transferable) to DVS Pro, the licence becomes a DVS Pro subscription. It isn't added alongside your original licence and will not revert back once the subscription expires.
Before you upgrade
- Check which licence you're upgrading. If you meant to upgrade from Single Machine to Transferable, a one-off purchase, make sure you choose that option, not DVS Pro.
- Compare the two: see What's the difference between standard DVS and DVS Pro?