WoWInterface - Can't start Designer

I've looked in your bugs section, skimmed through the forums and googled the error code I've been given, with no avail. I cannot find any solution to this.

When I start WoW UI Designer 1.1.110 I get an error. This error being:

The problem details are -

Code:

Description:

  Stopped working



Problem signature:

  Problem Event Name:        CLR20r3

  Problem Signature 01:        wowuides.exe

  Problem Signature 02:        1.0.300.0

  Problem Signature 03:        4cbe5efa

  Problem Signature 04:        System.Configuration

  Problem Signature 05:        2.0.0.0

  Problem Signature 06:        4a275e0d

  Problem Signature 07:        1a8

  Problem Signature 08:        4d

  Problem Signature 09:        IOIBMURHYNRXKW0ZXKYRVFN0BOYYUFOW

  OS Version:        6.1.7600.2.0.0.256.1

  Locale ID:        2057



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I don't see any problem, I have all the frameworks and everything the thread stickied has told me to get. My WoW is currently installed to my D drive though and not in a program files directory.

It has worked for me before, but suddenly stopped one day and refused to open ever since.

I'm running Windows 7. I have sufficient hardware to run the program. If you need any other information just ask.