Windows protection layers often block the software from reading your license files. Close . Right-click the GT Designer3 desktop icon. Select Run as administrator . Click Yes on the prompt.
Securely document your MELSOFT product IDs outside of your computer so they are readily available during unexpected reinstalls.
The error usually stems from issues with the software's registration, installation environment, or security conflicts: Missing or Incorrect Product ID
If the basic fixes haven't worked, here are some more advanced steps to take. gt designer license not found
This tool can sometimes repair the link between the software and the registered license key. 4. The "Clean Reinstall" Method
For physical key users:
Open the Windows and select Programs and Features . Locate GT Designer3 or MELSOFT HMI Works in the list. Windows protection layers often block the software from
Press Win + R , type %APPDATA% , and navigate to: C:\Users\ \AppData\Local\MITSUBISHI .
Delete residual files in C:\Program Files (x86)\MELSOFT and C:\ProgramData\MELSOFT (Note: ProgramData is a hidden folder).
Follow these troubleshooting steps in order to resolve the licensing conflict. Step 1: Run GT Designer3 as an Administrator Select Run as administrator
If the software was working previously and suddenly stopped, corrupted cache or configuration folders are the most likely culprits. Navigate to Local AppData : Open Windows Explorer and go to C:\Users\ \AppData\Local C:\Users\ \AppData\Roaming Identify GT Folders
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
Mitsubishi software is historically sensitive to newer OS's.
Windows protection layers often block the software from reading your license files. Close . Right-click the GT Designer3 desktop icon. Select Run as administrator . Click Yes on the prompt.
Securely document your MELSOFT product IDs outside of your computer so they are readily available during unexpected reinstalls.
The error usually stems from issues with the software's registration, installation environment, or security conflicts: Missing or Incorrect Product ID
If the basic fixes haven't worked, here are some more advanced steps to take.
This tool can sometimes repair the link between the software and the registered license key. 4. The "Clean Reinstall" Method
For physical key users:
Open the Windows and select Programs and Features . Locate GT Designer3 or MELSOFT HMI Works in the list.
Press Win + R , type %APPDATA% , and navigate to: C:\Users\ \AppData\Local\MITSUBISHI .
Delete residual files in C:\Program Files (x86)\MELSOFT and C:\ProgramData\MELSOFT (Note: ProgramData is a hidden folder).
Follow these troubleshooting steps in order to resolve the licensing conflict. Step 1: Run GT Designer3 as an Administrator
If the software was working previously and suddenly stopped, corrupted cache or configuration folders are the most likely culprits. Navigate to Local AppData : Open Windows Explorer and go to C:\Users\ \AppData\Local C:\Users\ \AppData\Roaming Identify GT Folders
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
Mitsubishi software is historically sensitive to newer OS's.