@ chinarobin
It might help the developer if you could note which method you use to close KM. By this I mean (1) using the FILE - EXIT K-MELEON or (2) clicking on the "X" in the top right corner of your screen. Keep a record and see if the problem happen from only one or both methods.
@chinarobin
I have an update for you about FavRenAdd in this thread.
http://kmeleonbrowser.org/forum/read.php?4,80851