Hi,
You no longer need to use installer nor update manager, simply download the zip version of Designer Workstation from tech community webMethods Service Designer Download
We update it regularly with fixes, we will in the future publish regular notifications so that you know that it has been updated.
You can swap out the trial license with your official license and there are no technical limitations compared to a standard installation. Other than it does not include BPMS, nor cloud stream connectors. We will be adding cloud stream connectors in a later version.
regards,
John.