This is a major release. If you want upgrade from a previous version follow these instructions.
hg clone https://bitbucket.org/wackowiki/wackowiki-stable -r 5.0.4
5.0.x -> upgrades
5.5.x -> fresh installations
This is the one and only upgrade and migration path to the new code base.
The 5.0.x development branch is reserved mainly for this purpose.
All users should upgrade.
Leave a comment here if something is not clear or you have further questions.