present windows

[R W Schauble]

Present windows function quit working. Multiple restarts no effect.

KDE Plasma 5.9.3
KDE Frameworks 5.31.0
Kernel 4.9.13-1-Manjaro
OS type: 64 bit

Worked fine originally in the upper left corner as installed. Added to
several edges. Worked fine. Then quit and have not been able to get
function back. Tried  resets and defaults.
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