I just have updated CCleaner to version 3.24.1850. It still doesn't support Adobe Acrobat XI.
[Adobe Reader XI]
LangSecRef=3021
Detect=HKCU\Software\Adobe\Acrobat Reader\11.0
Default=True
RegKey1=HKCU\Software\Adobe\Acrobat Reader\11.0\AVGeneral\cRecentFiles
FileKey1=%LocalAppData%\Adobe\Acrobat\11.0\Cache\Search|*.*
FileKey2=%LocalLowAppData%\Adobe\Acrobat\11.0\Search|*.*