On my computer now, if you simply click the edit button, it takes you to the annoying, over-complicated VisualEditor. If you want to get rid of this and have the old editor back, click the drop down menu next to the Edit button and select "Classic Editor."
Or, when the URL comes up whilst editing the page, it will say, for example:
http://eastern-european-school-of-magic.wikia.com/wiki/Johan_Kristensen?veaction=edit
Get rid of the "ve", and you have your classic editor.