cubase 7.5 cant edit audio files


Double clicking an audio file will no longer open the audio editor in cubase 7.5
Today I installed Cubase 8 Pro and upgraded my license, but after that was still able to edit audio, comping vocals.
A few hours later… try to edit an audio file and no audio editor opens.
I have restarted cubase and restarted my W7 machine to no avail.

What can have possibly happened?

Any ideas welcome…

Shame! Shame! Shame!
Solved it!
I had the sample editor positioned way off-screen… it was there all the time just not visible.

Now I have it back.
Blush! Blush! Blush!