[CCleaner 5.72 will start]

Found the solution: if all the check boxes in Options->Smart Cleaning are unchecked CCleaner is removed from memory.

[Documentation not up to date??]

1. It seems that the docs ara out of sync with CCleaner. It looks to me, that the Options->Smart Cleaning is taking care if system monitoring mentioned in the docs.

[Documentation not up to date??]

Documentation at https://www.ccleaner.com/docs/ccleaner/ccleaner-settings/changing-monitoring-settings-ccleaner-free title :Changing monitoring settings (CCleaner Free) is talking about setting the system monitoring. 

1. Quote

    

   1. Open CCleaner, then click Options > Monitoring
   2. Select Enable system monitoring.

    

   In CCleaner v5.72 exists no such setting as described in docs.

[CCleaner 5.72 will start]

CCleaner 5.72 starts when computer start, disregarding that  the Options->Settings-> Run CCleaner when computer starts is unchecked!

I have a PC running with minimal RAM, so I really don't need anything running in the background when I am not actually using it. Any ideas how to solve it?