To obtain a legitimate, functional version of GT Designer 3, you should use the official channels.
Do you already have an active ?
that can compromise your industrial control systems and personal data. Download | MITSUBISHI ELECTRIC Factory Automation
: Official versions require a Product ID key for installation. Key Features of GT Designer 3 Download - Mitsubishi Electric
If you are evaluating the software for an upcoming project, contact your local authorized Mitsubishi Electric distributor. Representatives can provide official trial links, temporary evaluation serial numbers, and technical documentation to get your environment set up safely. Step-by-Step Installation Best Practices
Browse to the HMI/GOT section under software downloads.
€38.80