I do notice that the key you mention is not cleaned
it is, however, cleaned via the latest community Winapp2.ini file's Winzip MRU* entry
[WinZip MRU*]
LangSecRef=3024
Detect=HKCU\Software\Nico Mal Computing\WinZip
Default=False
RegKey1=HKCU\Software\Nico Mal Computing\WinZip\Mru
For temporary time you can make your own winapp2 (or download the pre-made one I mentioned from the sticky thread) with this entry
However, the developers read all threads (rarely commenting or making their presence known) and that coupled with the entry's beta testing in Winapp2 this may get added to the default clean soon enough.