This assumes you have already cloned the SD2-repository.

If not, please follow the installation instructions how to do so:

• Installation instructions

• Installation instructions on SD2 Forum

• TortoiseGIT - Similar to TortoiseSVN Shell-Extention based GUI

• SmartGit

The word to look for is "Pull", both GUIs have this option.

For Command-line fans, simple right-click ScriptDev2-directory, choose "Git Bash here" and then type
$ git pull
to Update

In case you polluted something in your working directory open the Git bash, and type
$ git reset --hard origin/master

Warning: This will remove every custom changes