I've upgraded from WiX 3.10 to 3.11 and suddenly I'm unable to build my WiX install. In the solution, the wixproj files show "incompatible". When I go to open the .wixproj file directly, that file tag is not an option. I have the target path set to the "v3.x" in the PropertyGroup, as one post suggested. I have also cleared the "Appdata" for VS 12.0, and restarted my machine. I'm still unable to open .wixproj files. Has anyone found a solution for this?