I cant remember the adress, but search world editor unlimited on google.
Then it downloads wesetup, install that and open it.
Where it says open/launch WE Unlimited, click that and it shall open up WEU with all the extra features.
( i got muddled up before, there was something where you can make cliff tiles go up to 15 and making the map as big as 480x480 but not on WEU)
one thing you can do is have up to 16 tiles in a tileset, thats one good thing and there are lots of advanced functions in the trigger editor.
Good luck finding it.
~Jindo