Ok, I have not checked all the files, but don't you think that the huge amount of more then 20 GB (in difference) is a really big space apart from...
I excluded from drive C a folder called "munka" with adding a new category with filters (just for sure) "c:/munka/", "c:/munka/*.*",...
With reference to threads http://www.wilderssecurity.com/showthread.php?t=268817&highlight=exclude+folder...
Separate names with a comma.