Richard - that seems like a good plan if you dont want to re-get the entire package. Hot Towel is a convenience and really intended as a starting point. You want to keep up with it a bit though, perhaps in a new project, to see what new versions are brought down together at times. For example, I am getting ready to release an update to Hot Towel soon with some updates to the libraries. In your case you may want to remove HotTowel's NuGet package, but create a new project. Install the new VSIX (when ready) and see what is different in the dependent libraries.
I'll blog this too :)