In a nutshell, this is a tool that patches your editor files to remove the protection on the main campaign. This is equivalent to grant you "developer rights" and to let you alter the campaign, without creating a mod.
Download link:
https://www.dropbox.com/s/ogwuv8vhs12l1w6/Divinity%20Engine%20Developer%20Patch.zipImportant warning: this is for testing purpose only. Do NOT try to create a mod by altering the main campaign and zipping the result, it won't work. Mods still have to be created with the usual process.
If you don't know exactly what you're doing, the chances are very high that you'll break the game and have to reinstall it. Use your developer rights at your own risk.
Every time a new version of the editor is released by Larian, you'll have to patch again. Just restart the tool, it should be flexible enough to work even with future releases.
The zip contains an executable and the source code for Visual Studio 2013. The code is Public Domain.