Where is Web site administrative tool to set form based security in VS 2013 on Windows 7

I have version 4.5.50938 .NET framework and version 12.0.30324.00 Update 2 RC Visual Studio 2013

I googled and I got a hint that maybe this is deprecated.  I know forms-based web sites are older now but I need to use this model to do some maintenance work.  What would I use instead to set up for my web forms?  Is there any way I can still use WAT from the commanmd line or something?  Thanks.