Perpetual license, one-time payment. The full software: 7 relay brands, Circuit Breakers module with 10 trip units (L·S·I·G zones), Transformer module with ANSI/IEEE C57.109 damage curve and inrush, relay-relay, CB-relay and CB-CB selectivity with ΔT sweep cursor, test and selectivity reports. Bilingual interface and reports (Spanish/English).