As of Windows 10 Insider Preview Build 21277, "we’ve updated our folder logic in Start menu’s all apps list so that if a folder only contains a single item we will now display that item in place of the folder."
Source (under Changes and Improvements): Announcing Windows 10 Insider Preview Build 21277 | Windows Insider Blog
I ask the CCleaner team to please consider not including the CCleaner Homepage URL shortcut in the CCleaner start menu folder by default, in order to take advantage of this new behavior.
