If a world uses an object registry, the object registry can be reloaded at any time from the server administration tool. The world does not need to be stopped in order to reload the registry. Typically, you would reload the registry after uploading changes to the existing registry file on the server machine.

To reload the reigstry, simply right-click on the world in the world list and select Reload Registry.

Note that the Reload Registry menu option will only be enabled if the world has an object property set in the world properties.