Google Apps Directory Sync Administration Guide - Manual (Page 47)

Installation 47
If you upgrade GADS and then open a configuration file that you created in a
previous version, you need to save that configuration file with the current version
before you can continue using it to sync. Before saving, make sure your
configuration was imported into the current version correctly.
Uninstall Google Apps Directory Sync
GADS also includes an uninstaller.
To remove GADS:
1. Open a command line interface and go to the directory that contains GADS.
2. Run the following command:
uninstall
3. In the uninstaller, click Next to uninstall GADS.
4. Once uninstallation has completed close the uninstaller.
All GADS utility files and all libraries not used by other programs will be removed.
Log files and XML configuration files will not be deleted.