WLW error when opening

Two days ago Windows Live writer started giving me an error, see below. I've uninstalled, reinstalled, restored, unrestored and I can't seem to get this problem corrected.

I've tried 2011 and 2012 and neither will open. I know it's something simple somewhere that became corrupt or something, I just can't seem to track it down.

Running Windows 7
Blogger plateform

Problem signature:
Problem Event Name: APPCRASH
Application Name: WindowsLiveWriter.exe
Application Version: 16.4.3503.728
Application Timestamp: 5013b03d
Fault Module Name: mscorwks.dll
Fault Module Version: 2.0.50727.5456
Fault Module Timestamp: 4ef6c72d
Exception Code: c0000005
Exception Offset: 00009bb8
OS Version: 6.1.7601.
Locale ID: 1033

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