Vijeo Designer 6.1 stores license data in HKEY_LOCAL_MACHINE\SOFTWARE\Schneider Electric\Vijeo Designer\6.1\License . If you cloned a hard drive or restored a backup, the reference may break. Uninstall, clean the registry with a tool like CCleaner, and reinstall.
If you're experiencing issues with Vijeo Designer 6.1, consider: vijeo designer 61 reference serial number work
You can install Vijeo Designer in different modes depending on the credentials used: Vijeo Designer 6
During installation, the wizard will prompt you for two specific pieces of information found on your license certificate or email from Schneider Electric Reference Number (Part Number) the reference may break. Uninstall