Arduino IDE 1.6.6. immediately dies on launch (OSX 10.11.1)

HELP!

I'm attempting to use the current version (1.6.6) of the Arduino IDE for OSX, but when I launch the application the splash screen appears for a second, then the application vanishes. (I don't see it in the "Force Quit" window, and from the command line I don't see any Arduino process running).

Here's my setup...

OSX Version 10.11.1

In the Java Control panel it shows I am running Java Platform 1.8, Product 1.8.0_66, with a path of /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java

I can still run Arduino 1.0.6.

Anyone know what I need to do to get 1.6.6 working?

Thanks!

Holy crap, I stumbled onto what the problem was!

Just for the hell of it, I tried launching Arduino as super user via the command line. Here's the command (again, this is on OSX)...

sudo /Applications/Arduino1.6.6.app/Contents/MacOS/Arduino

...and it fired right up!

But then, when I attempted to compile the blink.ino sketch, I got this error...

/Applications/Arduino.app/Contents/MacOS/Arduino
java.lang.NoSuchMethodError: processing.app.Base.getSettingsFile(Ljava/lang/String;)Ljava/io/File;
at template.tool.GistUploader.init(Unknown Source)
at processing.app.Editor.addTools(Editor.java:929)
at processing.app.Editor.buildToolsMenu(Editor.java:784)
at processing.app.Editor.buildMenuBar(Editor.java:543)
at processing.app.Editor.(Editor.java:233)

What the hell is GistUploader? It turns out it was a utility I installed ages ago that was designed to automatically commit any changes in my Arduino sketches to my github account. I hadn't used it in a long time, and to be honest completely forgot it was there. Looking inside of the "tools" folder in my default Arduino documents folder, I found two sub-folders named "GistUploader" and "GistRetriever". I deleted both folders and their contents, quit and restarted Arduino by the normal method of just double-clicking the icon (no need to sudo, or to use the command line), it started right up, and has been working great since!

Woot!