Archetype Editor 2.2.905 beta has just been released.
http://www.openehr.org/svn/knowledge_tools_dotnet/TRUNK/ArchetypeEditor/Help/index.html
Release Changes since the previous 2.2.898 beta:
• Changing the data type of elements at the same specialisation level as the archetype is always allowed.
• Specialised XML archetypes preserve all term codes inherited from the parent archetype.
• The uid attribute is now loaded and saved in archetypes where it is present.
• Non-standard constraint definition items are now loaded and saved where they are present.