Crash on Disconnected Audio Interface

The following happens 100% of the time after lots of attempts to produce.
Configure Wavelab to use a particular disconnectible interface that is currently connected.
Close Wavelab.
Disconnect audio interface.
Open Wavelab.
Attempt to select a different audio interface that is connected.
(Wavelab hangs, and eventually crashes.)

Rane 62
Windows 10, Wavelab 9.0.25
('Driving me bonkers.)