One Software License is required per developer.
If you have a large project, part of which will be developed with Nevron Open Vision you need to license only the developers that will be actively developing with Nevron's components. You should however be aware, that only the licensed developers will be able to debug Nevron's components.

Nevron Open Vision Developer License is granted on a perpetual (permanent) and subscription (annual maintenance) basis.

The subscription lasts for a 12 month period from the date of purchase. With an active subscription, you will be eligible to receive all major and minor updates for NOV during the subscription period. Upon expiration of a subscription, you can optionally renew the NOV subscription for an additional 12 month period in order to continue receiving updates and maintenance from Nevron.

Runtime Royalty Free.