A few folks in our office installed the latest "SQL Server Data Tools – Business Intelligence for Visual Studio 2012" mentioned here and now we are unable to open .bim files. When we attempt to open a .bim file in our tabular projects we get a "Class already exists" error. Those who did not install this update are still able to connect/open just fine. We've seen this when creating new tabular projects or trying to open existing tabular projects (both in and out of TFS).
Is there a preferred install order for SSDT-BI 2012 and VS2012? It's been quite a hassle to get our dev systems back to functioning order.