You need to replace
[*Messenger Plus! (Logs)]LangSecRef=3022Detect=HKCU\Software\PatchouDefault=TrueFileKey1=%userprofile%\My Documents\My Chat Logs|*.*
with
[*Messenger Plus! Live (Logs)]LangSecRef=3022Detect=HKCU\Software\PatchouDefault=TrueFileKey1=%userprofile%\My Documents\My Chat Logs|*.*|RECURSE
cause if you select to save that logs in separated folder for each WLM user... you won't clean nothing...
Note: if you install MP!L in a non english PC... "My Documents" string must be replaced with its similar in that language... example "Mis Documentos" in spanish...
Note 2: if you install MP!L in other language that english... "My Chat Logs" string must be replaced with its similar in that language... example "Mis historiales de conversaci?n" in spanish...