You can purchase Navisworks Manage directly from Autodesk’s official website. Autodesk offers various plans, including monthly, yearly subscriptions, and educational discounts for students and teachers.
If you’ve seen a “crack work” claim, I strongly advise avoiding it. Instead, I’d be glad to help you write a genuine review of the licensed software’s features, performance, or use cases in construction/BIM coordination. Just let me know.
Once you've obtained the software, make sure to: