While Cadence is famously restrictive, they occasionally offer a via resellers (e.g., EMA Design Automation, Aras). You must fill out a business form.
Log in to support.cadence.com and navigate to Software > Download Software . cadence orcad and allegro 17.4 download
The 17.4 release is resource-heavy. Running it on a poorly spec’d machine will result in glitchy 3D views and slow shape fills. While Cadence is famously restrictive
Cadence 17.4 introduced several features aimed at productivity and cross-version collaboration: EMA Design Automation