Gt Designer License Not Found Jun 2026

Uninstall GT Designer3 and GT Works3 from the Control Panel.

Open the Registry Editor ( regedit in the Run dialog) and delete broken Mitsubishi keys under HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\MITSUBISHI . (Warning: Back up your registry before making changes). Restart your computer. Temporarily disable your antivirus software.

Click and then OK . Launch the software to see if the error persists. 2. Verify Your Base Installation Sequence gt designer license not found

: Incompatibility with specific regional language settings can trigger internal errors during startup. Security Software Interference

Keep your industrial software isolated inside a VM (such as VMware or VirtualBox). This protects the software from Windows updates that can disrupt registry files. Uninstall GT Designer3 and GT Works3 from the Control Panel

Running the software without administrative privileges, preventing it from reading the secure license directory.

Uninstall and any associated Mitsubishi License Management tools. Restart your computer. Restart your computer

Sudden power outages, registry cleaning software, or Windows updates can corrupt the specific files where MELSOFT stores registration data.

If all else fails, perform a clean uninstall of via the Control Panel and reinstall using the latest version from the Mitsubishi Electric Global Website .

: Run the installer (setup.exe) and the application itself as an 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 .