(if you know which library)
Close Ulead VideoStudio completely via the Task Manager ( Ctrl + Shift + Esc ) if it is hung in the background.
Check the box under : “Run this program in compatibility mode for:”
Navigate to the following folder: C:\Users\[Your Username]\AppData\Roaming\Ulead Systems\Ulead VideoStudio\11.0
Note: This will reset your library to factory settings, losing custom libraries. Solution 2: Reinstall or Repair the Software