Do you want to have more than 6 elements in Explorer Jump List ?
In registry add under
HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
a new Dword entry JumpListItems_Maximum and give it a decimal value of 20.
It works immediately (no restart required).
This info is given as is. Without any warranty and responsibility. Made changes in registry may cause errors and it will be under your only responsibility.
Infos found at this link:
http://www.tenforums.com/general-discussion/7983-increase-number-items-jump-lists-5.html