Based on this demo http://gorgeousapps.com/MultiPageDemo.zip, the sidebar menu is populated in the Main module, and as a result, every page gets an identical menu. How do I populate it or change it in each individual page so that the menu may look different on different pages?
The menu is the same accross all pages by design in the SK library. It is the standard way way to navigate between your pages. You could probably clear it and refill it every time but that does makes little sence to me why one would do that with a menu.
Perhaps it has to do with Permissions. One option would be to add all the items in the menu and then depending on which permission the person has / not, then hide the drawer item that does not suit that permission. In some xtra ordinary cases disable an item.
The quick way though like ab said, is to just clear and add, that's how I do it in BVAD3.