This is a simple registry edit,
- Open Registry Editor using the search tool on your task bar.
- Navigate to
- Edit or create the DWORD "JumpListItems_Maximum" and give it a Decimal value of what ever you want the new max jumplist to be, for example "20".
- Now close regedit and restart explorer to enable the change. You can restart explorer by opening task manager and right clicking on it then click restart.
That's it, your done!