How to download and setup upm
Open terminal and run command
git clone https://github.com/LunarWatcher/upm.git
git clone is used to create a copy or clone of upm repositories.
You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with upm https://github.com/LunarWatcher/upm/archive/master.zip
Or simply clone upm with SSH
[email protected]:LunarWatcher/upm.git