How To Fix WIF Visual Studio 2010 Add-In
I upgraded my Visual Studio 2010 and installed the new SP1, but then I found that "Add STS Reference" is gone.
The add-in is in place but it does not work.
It took me some time to find the solution:
Run the command:
devenv /ResetAddin Microsoft.IdentityModel.Tools.VS.VSAddin.FederationAddin
Now everything is back to normal.
Hope this will help.
Manu