Run setup.exe and enter the found on your license certificate. 2. Re-verify the Product ID If the main software itself shows the error:
: Navigate to your local AppData folders (e.g., C:\Users\ \AppData\Local or Roaming ). Look for folders related to GT Designer or GT Title and try renaming or deleting them to force the software to regenerate fresh configs upon restart.
Resolving the "GT Designer License Not Found" Error: A Complete Guide
If your computer shut down unexpectedly or a registry cleaner was used, the license verification files might be damaged.
The error message "GT Designer License Not Found" is a common hurdle for engineers and technicians working with Mitsubishi Electric’s HMI (Human-Machine Interface) software. This issue typically arises when the software cannot verify a valid product ID or communicate with the license management system. gt designer license not found
For official technical support or to verify your license status, you should contact your local Mitsubishi Electric Sales Office or an authorised distribution partner. GT Simulator3 Version1 Operating Manual for GT Works3
Complete the installation and restart your PC once more before launching the software. 4. Configure Antivirus and Firewall Exceptions
Right-click the shortcut icon on your desktop or in the Start Menu. Select Run as administrator .
If you have a legitimate serial number and the steps above don't work, your license might be "locked" to a previous hardware ID. You will need to contact your local to have the license deactivated or reset for your new machine. Run setup
Sometimes, Windows User Account Control (UAC) blocks GT Designer3 from accessing the registry hive where the license key is stored.
Select . Some versions allow you to "Repair" or "Re-enter Product ID" without a full reinstall. Check for Conflict with "MELSOFT Selection" :
Before diving into fixes, understand the software architecture. Mitsubishi Electric's GT Designer3 uses a . Unlike simple subscription software, GT Designer relies on recognizing a specific hardware ID or a physical key (Licensing USB dongle).
Search for > "GT Works3" . Select "GT Designer3 License Registration" . Look for folders related to GT Designer or
If you just installed Mitsubishi GT Designer3 and are getting a "License Not Found" error immediately upon startup, don't panic. Here is the checklist that solved it for me:
: Look for folders named "GT Designer," "GT Works," or "GT Title" (common in some software variants). Rename or Delete
If you use GT Designer on a VM (like VMware or VirtualBox), ensure the VM has consistent hardware ID settings, as some licenses tie themselves to the virtual hardware signature.
64-bit Windows systems often look in the wrong folder for the 32-bit software license.