A feature of CleanMyMac app is the menubar mini-app. It lets you free up RAM; check memory pressure in Activity Monitor; open new Finder windows; monitor, view & empty the trash; open the Energy Saver system preference or directly launch the main app.
When it's available in the menubar, that is. It had vanished from my MBA, despite setting the app to display it.
Tried reinstalling the app, no go. I sent of a fault report then, in desperation, restarted from my DiskWarrior USB stick.
Replacing the MBA's directory restored the missing CleanMyMac mini app to visibility & full function.