CircuitStudio licenses are perpetual* (lifetime licenses) and include 12 months of Maintenance Subscription. Any updates including major product releases may be installed during the 12 months period. After 12 months, the software continues to work and may be reinstalled with versions released prior to the subscription expiry date.
Maintenance Subscription doesn't mean that the software is time limited - it provides entitlement to updates so that when newer software is released you may stay up to date during the subscription period.
An additional 12 months of subscription (maintenance) can be purchased at any time using MFG PN 11-004-15-1 EMFG PN 11-004-15-1 E.
*The one exception is student/educational licenses, these are 1 year term, include software updates but do not include technical support. Such licenses are available by special request only and are not available to purchase online.