I ran CCleaner late at night (without any other thing running) and it was taking a very long time so I let it run and went to bed assuming the analysis would be there in the morning.
I found only the Desktop showing with no sign of CCleaner anywhere. Does this mean that after analyzing and then no action taken for some time it just closes down?
I used Wipe free space (3 passes on perhaps 10GB of free space) and I didn't use 'close program after use'. It didn't seem to have that option by error as I repeated the wipe later and it took its time to complete although a seemingly shorter time than I waited before bed!
The version is 3.28.1913 downloaded from Piriform a few days ago.
Perhaps this glitch is just one of those things but if it happened after many hours of a multi- pass it would be annoying.