Single-user licenses are limited in how many "instances" (open copies of the software) you can run. Legacy perpetual licenses are typically limited to 2 instances per machine, regardless of the edition. 3. Understanding the Subscription Tiers
All Black USB licenses (numbers 22000–40999) are perpetual. Newer red or green USB keys and softkey licenses can be either perpetual or subscription. 2. Single-User Fixed Licenses zemax opticstudio license fixed
These are owned outright. While they run the software forever, they require an active support agreement to access new releases or technical support. Single-user licenses are limited in how many "instances"
It must be installed on the same computer where you run OpticStudio. zemax opticstudio license fixed