For some reason, lately vegas5 has been opening two windows when I click on the Track FX button. The topmost window is empty and overlays the correct window showing the default choices for Track FX. If I click on the header for the correct window, it pops to the front. If I click anywhere in the empty window, I get a system audio indicating an error and nothing happens.

Anyone know how I got this window, and how to stop it from opening with the Track FX window?