If restoring doesn't work, manually point the software to where your libraries are installed. :
To understand the fix, you have to understand how Toontrack products work. When you install EZdrummer 3, it installs two distinct things:
Before attempting advanced fixes, ensure the core components are actually present on your machine.
Navigate to your Toontrack folder. By default, this is usually: C:\ProgramData\Toontrack\EZDrummer\ macOS: /Library/Application Support/Toontrack/EZDrummer/ Select the MIDI folder and click Open. 2. Update via the Toontrack Product Manager