My training screen disappears after I press "GO"

It is possible the system has "remembered" an odd position and size for the training screen.  Try the following:

Run the Software.

Press "Run the next Session"

MOVE the training/control screen by grabbing the title bar (click and hold down left mouse button) and move it just a little bit.  Down and to the right would work.  Just slide the window, then release the mouse button.  It will stay in the new position.

Press "GO" and proceed normally.

The training screen will now stay in the position and size you gave it.  This step "resets" the training/control screen size and position.