Is license perpetual?

Access to the licenses is time-unlimited. All updates from version x.0 to x.5 and from version x.5 to the next major version are included.
Upgrades to new versions are available at discounts ranging from 10% to 35%; earlier upgrades yield greater discounts.
Licenses acquired less than a year prior to the launch of a new version are eligible for a complimentary upgrade.
Additionally, after upgrading all primary licenses, any Free Additional License will also be updated for free.