Press z and m for editor 1 - Blocks 2 - Inside geometry 3 - Spikes 4 - 4 long blocks 5 - Special 6 - Speed Portals and more 7 - Slopes and more 8 - New Pits and more
Credits to EdmundvGD for the archive of the editor. And I'm gonna be the only one using the modified editor, like I'm gonna be milking this editor I guess...