Very strange. Do you have vs2013 update 4 installed? The menu item Help->About Microsoft Visual Studio should list it next to the version number (for me it is "Version 12.0.31101.00 Update 4")
Go to visual studios menu Tools->extensions and updates...->Updates->Product Updates to try to update
Win10 shouldn't matter. Community version should be fine.
Alternatively, you can build it yourself - WinUAEToolChain.sln includes the full project to make the vsix
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