You're looking for a guide on using the "Unity Pro Universal Patcher".

Most individual developers can use the Unity Personal Plan, which is free for those with less than $100,000 in annual revenue. Additionally, many formerly paid tools like ProBuilder are now free for all users. Unity Is Now Offering ProBuilder for Free - boxx-tech.co.uk

Unity provides official tools for legitimate development needs, such as security remediation and platform-specific updates:

Common Issues and Solutions:

While the Unity Pro Universal Patcher may seem like an attractive solution for developers, the risks and consequences associated with using such tools far outweigh any potential benefits. By choosing a legitimate Unity license or exploring alternative options, developers can ensure project stability, security, and access to official support and updates.

Project Instability: Unofficial patches may cause crashes or "pink material" errors because they do not correctly update internal render pipelines or dependencies. Alternative Official Tools