The SVN repository contains the latest development changes and may not be as stable as the source packages, it is only recommended for developers. For documentation on how to use SVN see here. For windows we recommend you use the TortoiseSVN client (download here).
The sourcecode can be obtained via SVN using the following command:
Using the Switch command in SVN allows you to change between branches/trunk without having to redownload every file. Only files changed will be downloaded.
Right click on the "scorched" SVN folder and select TortoiseSVN -> Switch...
In the "To URL:" box replace https://scorched3d.svn.sourceforge.net/svnroot/scorched3d/XXXXXX with the desired branch/trunk directory.
To get the latest, leave the revision set to "HEAD" and then click the OK button.
E.G.: Replace the trunk (https://scorched3d.svn.sourceforge.net/svnroot/scorched3d/trunk) with https://scorched3d.svn.sourceforge.net/svnroot/scorched3d/branches/heightmap to replace the trunk with the new heightmap work-in-progress. Under unix this would be : svn switch https://scorched3d.svn.sourceforge.net/svnroot/scorched3d/branches/heightmap /opt/src/scorched3d/scorched