Mine comes off pretty easy with this technique:
- jack up the bike so I can get under there and see the tabs.
- grab the bottom of the shroud and pull hard to the right while watching for clearance on the bottom-left tab.
- once clear, pull the bottom-left corner of the shroud gently away from the radiator.
- with the bottom-left free, pull the bottom of the shroud to the left to free the bottom-right.
- again grab the bottom of the shroud and pull to the right this time watching the top-left tab.
- once clear, pull the top left corner gently away from the radiator.
- you are done.
I find the bottom to be more difficult and the key for me is to be able to see what's going on, work one corner at a time and resist the temptation to yank it off.