The first beta release of Message Compiler Editor 3 is available here. The main new feature is the support of Unicode message files (version 2.x was still compiled with Delphi 2007). Importing already existing message files is planned for this release but not available yet due to some bugs still needing to be fixed in the parser.
The UI has been switched to ribbons, more to work a little with Delphi implementation of them (I use Developer Express ExpressBars for my commercial applications) than for a real need.
Please use the Contact page to report any bugs, due to server side space constraints I'm not able to enable comments on this site.