A workaround for restoring HierarchyId in SQL server 2014

After installing VS 2015 CTP 4, HierarchyID stopped working in SQL Server 2014. This is the bug listed here.

I am looking for a workaround.

To that end, I have tried reinstalling everything associated with SQL Server 2014 and Visual Studio 2015 CTP.

Additionally, I noticed the following (before the reinstall):

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After re-installing, I now have version 12.0.2000.8 installed, and its 6.80 MB.

Additionally, I know that I have a working version of the SQL Server type assembly as I can run the following C# code without error:

        var root = SqlHierarchyId.Parse("/");        var parent = SqlHierarchyId.Parse("/1/");        var child = SqlHierarchyId.Parse("/1/1/");        Console.WriteLine(child.ToString());

While in SQL, the following errors:

    declare @Root hierarchyid = '/',    @Parent hierarchyid = '/1/',    @Child hierarchyid = '/1/1/';    print @Root.ToString();    print @Parent.ToString();    print @Child.ToString(); -- Throws exception

Is there a way to force SQL Server 2014 to use a particular assembly for this type? Additionally, if I could track down the actual source of the file that is the source of the error I would have a chance at restoring that file/set of files. Is there a way to get the error message to show the file that it originated from?