Given the proliferation of files outside of the application bundle that Fusion relies on, simply dragging the Fusion app to the trash is not a sufficient uninstallation process.
Fusion needs an uninstaller application that has an option to fully remove these support files and vestiges of older Fusion releases that are now manual processes in a KB article.
As a side note, the Fusion installation and upgrade process needs to be more robust. I've answered too many questions here in the forum where the solution has been "uninstall and reinstall" because something is wonky after an installation or upgrade.
