I seem to have 'lost' my sticky notes. There was an update request on the notes themselves which I blindly clicked, and *poof* they were gone. Soon after that, the Fall Update came through and now, even though the sticky notes app appears to be open (and appears in the processes list) they are nowhere to be seen

 

 

 

Here, you can clearly see the app is open, but no notes:

 

 

 

 

 

 

 

 

Any ideas??