The minimal support Blender version is v2.80. If you need v2.79 support, check out v3.4 of this documentation (no FACSvatar Blender add-on).

FACSvatar-Blender add-on

Modify the FACSvatar-Blender add-on

Download the code

Git pull of FACSvatar with support for submodules:

git clone --recurse-submodules

or manually clone latest version of the add-on:

git clone  # if not cloned yet.
cd FACSvatar/addons
git clone

If you normally cloned FACSvatar and want to pull the add-on as submodule, or just update:

git submodule init  # first time only
git submodule update

More information on git submodules: