If you have a Dell computer, an included component (Dell Backup and Recovery) causes issues with QT, the framework that World Machine uses. It installs a shell extension DLL (DBROverlayIconBackuped) that crashes World Machine.
- Update to the latest version of the Backup and Recovery application, which fixes this problem.
- Alternatively, you can uninstall the Backup and Recovery application
For more information about this issue, see here: