All subscription licenses can be upgraded to more advanced versions any time during the subscription period:
Upgrade from Silverstack to Silverstack XT
If you decide to upgrade your Silverstack yearly subscription to a Silverstack XT yearly subscription, please contact us at firstname.lastname@example.org.
The upgrade will be done manually by the sales team via a prorated refund. This means that you will receive a refund for not using Silverstack in the current subscription period, and be billed accordingly for the rest of the time in which you are using LiveGrade Pro.
Upgrade from Silverstack or Silverstack XT to Silverstack Lab
If you would like to upgrade your existing Silverstack or Silverstack XT subscription to Silverstack Lab, you can do this yourself with the automatic upgrade form.
Upgrade from older version permanent licenses to subscription licenses
Older permanent licenses of Silverstack and LiveGrade Pro can be upgraded to subscription licenses. For an upgrade please contact email@example.com.