1.- Make sure k-meleon is *not* running.
2.- Fire your favorite text editor.
3.- Open the file "prefs.js", it's usually located at:
C:\Your_Kmeleon_Path\Profiles\default\random.slt\Prefs.js
Of course "Your_Kmeleon_Path" & "random.slt" depends upon your system configuration.
4.- Use the search function or look for lines like this:
user_pref("kmeleon.MRU.URLnn", "
http://www.somesite.com/"
and delete them.
5.- Save & Close the file and check K-meleon again.
HTH