The GT Title Designer is one of vMix’s most powerful tools for live graphics. Unfortunately, the "license not found" error is often misleading—it usually means for your current edition, not that your key is invalid. Start with step one (check your edition), and you’ll likely resolve it within minutes.
: If your license was recently upgraded or moved, you may need to re-enter it. Open vMix and go to Change Registration Key and re-enter your key.
If you're seeing a "License Not Found" or similar configuration error in the vMix GT Title Designer