for non-commercial, non-academic personal use that does not require a paid license. Academic Site Licenses:
Activation is a critical step for professional engineers and researchers to move software from a "trial" or "evaluation" mode into a full-featured, non-expiring state. For example, a standard evaluation license might only allow 30 days of use before the software becomes "broken" or inaccessible without a valid activation code. Official vs. Unofficial Tools Ni License Activator 1.2