Rekall fails to load after install

Rekall relies on GreenHopper to work properly. In some instances where Rekall was installed prior to GreenHopper, it is possible that Rekall fails to load the Triangulation Board. If that's the case, try to uninstall Rekall and re-install it after GreenHopper has been installed. Disabling and re-enabling Rekall is not sufficient. You have to uninstall and re-install Rekall.