Gt Designer License — Not Found

[Help] GT Designer3 "License Not Found" Error - How to locate the serial key?

A full software reinstall is often the most effective solution.

Enter the (3 digits followed by 9 digits) exactly as it appears on your License Certificate . 3. Clear Application Cache

Windows Security often blocks applications from reading registry data or license directories. Right-click on the shortcut icon. Click Run as administrator .

If a reinstallation fails, remnants of old licenses may still be cached in the Windows Registry. Press Windows Key + R , type regedit , and hit . gt designer license not found

Installing an update package (upgrade version) on a computer that does not have a base, full version of GT Designer3 already installed.

Locate the specific driver entry paths for your endpoint security suite (e.g., Trend Micro mini-filter drivers).

To avoid unexpected downtime in the future, implement these best practices:

Ensure the string matches your official purchase license. [Help] GT Designer3 "License Not Found" Error -

GT Designer3 requires a valid product ID (serial number) during the installation process. If a trial key was used and has expired, or if a typo was made during the initial setup, the software will lock itself after the installation wizard closes or after the grace period ends. 2. Corrupted Licensing Registry Keys

If registry paths are broken, a standard uninstallation might leave residual data behind, causing the same error upon reinstallation. A thorough clean reinstall is the most reliable solution.

: Look for folders named "GT Designer," "GT Works," or "GT Title" (common in some software variants). Rename or Delete

Mitsubishi software relies on background services to verify authenticity. Press Win + R , type services.msc , and hit Enter. Look for any service starting with . Click Run as administrator

Go to Control Panel > Programs and Features , select GT Designer3 (and associated MELSOFT packages), and uninstall them.

For 64-bit systems: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MITSUBISHI

The "GT Designer License Not Found" error is a common roadblock for automation engineers working with Mitsubishi Electric’s GOT series Human-Machine Interfaces (HMIs). This error typically triggers when launching GT Designer3, preventing users from creating, editing, or uploading HMI projects.