Six2Five 1.0

You can use Six2Five either as a command line program or a program with a GUI.

Double click the .jar to run it with a GUI. Select a regions.yml file to downgrade.

Or instead, run it in the terminal:

java -jar six2five.jar /path/to/plugins/WorldGuard/world/regions.yml

Six2Five will make a backup of your old regions file.