How to make an update?
If you have installed the software already it depends on the
kind of your first installation.
Go to your installation directory and execute git ...
git pull origin master
This is much easier - you don't have to download and extract anything.
Go to your installation directory and execute svn up.
svn up [webroot-directory]/javascript/amcplayer
Download the zip file of the latest version:
Download
Extract the content of the zip file into your current installation.