Use the System Under Test Administration window... to modify a SUT's definition. Any changes that you make will not affect any active tests that use the SUT's definition, but will be used when a new test is executed.
To modify an SUT definition:
Click Edit to display the System Under Test Administration window... in Edit mode (a label <Editing> identifies the current mode).
Modify the information as necessary. You may edit information on the General and Meta Data tabs
Click Save to save the changes, or Cancel to reset the form to the original state.