Hello: Studio One has been acting a little weird recently with occasional freezing. At the moment I find that S1 will not add a MIDI track when I double click on the Instrument track. Actually nothing happens when I double click. I tried several things and found that if I CTRL-left mouse I can select an existing MIDI track in the Instrument track and delete it but that is not normal behavior. Did I press something by mistake that changed the way S1 works? Thanks for any advice.