1. Sublime Text 4
I upgraded recently from ST3 to ST4 and CCleaner no longer detects Sublime Text in the Applications tab.
2. Adobe Products
Even Adobe Acrobat is detected as application by CCleaner and lists it as "Adobe Acrobat Reader" it doesn't clean the opened files history. I have to open Adobe Acrobat and clean recent files. For Photoshop, Illustrator I have to open every application and clear the list of the opened files from File menu.
3. Microsoft Office
CCleaner detects Microsoft Office, but for 2019 and 2021 versions still lists the package as 2016.
4. WinSCP
This program stores information in Windows Registry. CCleaner could detect and clean for this application too.