The best way to resolve this condition is to do a full uninstall and a full re-install of all of the SM components on that server, ensuring that the DB is not affected, and that the LAS (if installed on this server ) is migrated away. Please ensure that the CC is demoted, and all of the associated agents are reassigned to another CC.
Uninstalling only the UI components will break the box.
This situation should be avoided until 6.5 service pack 1 is installed, this should have resolved the condition triggered by the UI-only uninstallation.
Install SP1 before removing UI components.