Sorry for being unclear, I meant the default download folder and the unrar folder. The rars are not being deleted after they have been unrared to the default download folder.
Problem is, I just dowloaded some random rar file to test the behaviour - and of course it worked and was deleted. So now I am not sure what could have caused it - I definately had it on more than one file, it was about 6 or 7 folders wirh rar files left, all of them being bigger than 300mb. For now, if you haven't experienced it yourself I am a bit lost how I cuold try and reproduce it, but I will post again if it reoccurs.
edit: just saw that this topic is covered in the help section already, overlooked that. So sorry for the double post.