This tool can sometimes repair the link between the software and the registered license key. 4. The "Clean Reinstall" Method
Occasionally, a Windows 10 or Windows 11 update will break legacy kernel drivers. Mitsubishi is notoriously slow to update their drivers for new Windows builds.
Run the main Setup.exe for GT Designer3/GT Works3 as an administrator and enter your valid product ID. Preventing Future Licensing Issues
The software was installed without a valid product ID (Product Key), or a typo was made during installation.
There can be an instance where the configuration file of the application which is giving you the error is corrupted. In this case, vMix Forums gt designer license not found
You may be trying to run a specific version of GT Designer (e.g., GT Designer2 vs. GT Designer3) that isn't covered by your current Product ID. Step-by-Step Solutions 1. Run as Administrator
Keep a secure digital record of your product IDs, installation discs, and site certificates.
Navigate to your local disk drive, typically: C:\Program Files (x86)\MELSOFT\ or C:\Program Files\MELSOFT\ .
Users have found success by clearing the "GT Title" configuration. This tool can sometimes repair the link between
Or:
You might want to verify if your license is for a Single User or a Site License , as exceeding the allowed number of installations can occasionally trigger validation errors.
Document all purchased MELSOFT Product IDs alongside the specific engineering laptops they are assigned to.
Locate any folders named GT... (such as GT Title or Mitsubishi ) 1.2.4. Mitsubishi is notoriously slow to update their drivers
Securely document your MELSOFT product IDs outside of your computer so they are readily available during unexpected reinstalls.
Are you using a of GT Designer, or is it part of the larger GT Works3 software suite?
Uninstall the current version. Locate your original, full installer package (often labeled as the "Base" or "Standard" installation disk/folder). Install the base version first, input your product ID during this stage, and only then apply the latest updates. 3. Use the MELSOFT Registry Fix (64-bit Windows OS)