No EditorOptionDefinition Export Found Error

Question

In Visual Studio 2013 I started getting the following error when trying to open C# files:

No EditorOptionDefinition export found for the given option name:
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Answer 1

Running windows 8.1, VS2013.3 and was able to find the folder. Using the find function in 8.1 did not find the folder, but looking into the %APPDATA% folder I was directed to a Roaming folder. Then by going one level up I did see the local folder in AppData.

The final path where I was able to find the folder was the same as mentioned above. C:\Users\\AppData\Local\Microsoft\VisualStudio\12.0

Renaming the folder did work.