Simply download and import the package through Unity and everything should be good-to-go.
If everything imported correctly, you should be ready to use uTemplate!
Upgrading to a newer version
There are currently no special upgrade instructions -- you should be able to import from the Asset Store without any issues.
Be aware that Unity's import functionality can be a bit fickle, so please remember to make a backup first! Even if you don't think you need to, it's always better to be safe than sorry!