Once the legacy components have been uninstalled, you can remove the data from the previous Engine, Event Monitor, and Agents. This is most easily done by deleting the folders themselves.
The Data folder for the Engine is located at: C:\ProgramData\Novell\Storage Manager\Engine\data
The Data folder for the Event Monitor is located at: C:\ProgramData\Novell\Storage Manager\Event\data
The Data folder for the Agent is located at: C:\ProgramData\Novell\Storage Manager\Agent\data