Just a heads up. I have come across this issue a couple times where VS will crash while shutting down, and after digging in I found out the UnrealVS.dll is trying to find a tool window in VS during shutdown and that is causing it to crash.
Just to clarify, are you using the Express, Professional, or Ultimate version of Visual 2013? If you are using Express, are you using the Express for Windows Desktop?
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Thank you.