Btw does anyone know how to make these 90° cliffs in WE?
You might have noticed the straight cliff in the picture above. You can make straighter cliffs than the World Editor normally allows you with the miscdata.txt file.
Therefore you have to create a new folder called "UI" inside your Warcraft III folder. And then save the miscdata.txt in that folder. You don't need to import it into your map! (The file is attached at the bottom of this post.)
WEU can be harsh if you don't be careful. All new things that come in one's hands may be. Please do not be rude with others' opinions, even more if you talk like this to the staffArg, AceHart you lies. WEU ruined my map, and always gave me troubles with crashing with certain units, removing some data (I open up my map and find lost progress, even though I save everytime I test, every so often, and I test often, and when I close it of course). Do NOT use WEU, it is completely useless except for showing "hidden icons" and "hidden units" which no one uses anyways. And you can find a list of them too.
SFilip in this post pretty much covers the topic, so no reason to go on, I agree.First of all you need to realize that everything WEU does can be done with the normal WE as well.
Now as for this map corruption...
In most cases it's the dumb (sorry, had to say it) users' fault. No offence to the exeptions. Same goes for map protection. They protect their map and soon enough a thread comes up "OMG I protected my map and now I can't open it!!"...
WEU has many interesting features, but some of them can really be dangerous (that might not be the right word; they will do exactly what you asked them to anyway) for your map if you don't read the warnings and all. However usually these things are reversable so you should have anything to worry about.
The real map corruption, editor failing to save the map from some reason, has the same chance of happening in WEU as with normal WE. However I must warn you that these things, from what I read around here, not as rare as most people think. If you don't have a backup it might just happen that one day you try to load and figure out that everything you worked on is gone...
Conclusion: always keep a fresh backup.
Do so and you have absolutely nothing to worry about...in worst case you will lose an hour of mapping or so.
Anyway which extra features are you referring to here?
Edit: wow, I'm slow...4 posts came up while I was typing.
If you only need the no-limits part there are other, safer way to remove limits. Namely Grimoire or We-No-Limits (both found in the Useful tools topic).