Aaaah it's awesome! Absolutely brilliant how you did the events window, it's great! (Although, in BC, elevators go up or down, not left or right )

Two minor suggestions (just some polish though)
-When one of the menus is opened (say, File) and you slide to the next (Edit), make it so that the next menu is opened
-For event parameter checkboxes, display the parameter name only once

Anyway, I'm impressed... MLLE is coming out REAL GREAT!


EDIT: Also, I must say, even though it's just a temporary logo it plays nice with Windows 7's folder icons!