SelBlocks Global is an enhancement of SelBlocks. It's a part of SeLite. However, SelBlocks Global's code is in a repository separate from the rest of SeLite.
See extensive documentation of SeLite for benefits and installation.
GIT-clone and develop on Linux or Mac OS, as this needs symlinks. It requires SeLite to be cloned under that exact name (in CamelCase) in a neighbour directory.