Ubuntu – Change LXDE desktop context menu

I am currently running on LXDE, and I'm curious as to whether there is a way to change the context menu when right clicking the desktop.

I'd like to replace Xterm with LXTerminal.

Is there a config I should change for this?

EDIT: For clarification, to enable the Window Manager context menu, you have to visit desktop settings->Advanced, and click the checkbox for enabling the Window Manager menu.