Using a Subscription License, requires to pay recurring fees in order to run and use the software. You can cancel your subscription when you want. Cancelling a subscription will end your access to the software at the end of the current subscription period. The upgrades are free of charge when using a Subscription license.Perpetual Licenses have higher cost but no recurring fees. The license is yours forever. The minor upgrades (1.0 -> 1.1 -> 1.2 ...) are free of charge for Perpetual licenses, but major upgrade (1.0 -> 2.0) are not.