brkurt wrote:You need to load the new rig from https://bitbucket.org/ThomasMakeHuman/newrig
This has nothing to do with a new rig. The muscle topology is a feature for 1.1 which means for now you can get it from the official source at https://bitbucket.org/MakeHuman/makehuman or download a nightly unstable build.
The newrig repository is not recommended as it has been abandoned.