I would like to be able to debug TypeScript 1.0 code using Visual Studio 2012 with Web Essentials.
According to this YouTube video, you firdst need to set the "Generate Source Map" option to True to map the executing Javascript code to the original TypeScript source code.
Here's a snapshot from the video:

However, look under Extensions andd Updates to see if I have the latest version of Web Essentials, it shows no Update available and that my version is 3.8. however, when I check my TypeScript options, there are much fewer options available and it does not include the "Mapping" option I am looking for:

I realize that TypeScript is new and evolving and I suspect that this functionality has possibly been de-implemented(?) but I was wondering what is the best and/or easiest way to step through TypeScript code?