Visual Studio C++ project error re: LOCALAPPDATA
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I'm trying to create a new C++ project in VS 10, and can't even get an empty project to load from the template.  I get an error...

The "exists" function only accepts a scalar value but its argument "$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" evaluates to "{~}" which is not a scalar value.

The {~} value is what I have stored in the LOCALAPPDATA variable in the computer Environment Variables, concatenated with "\Microsoft\MSBuild\v4.0\Microsoft.Cpp.Win32.user.props" at the end.

I'm reluctant to go changing any template files without understanding what's going on.