That's a phantastic progress for all those people who don't like the command line interface of DictionaryGeneration / JarCreator !!
I have the following feature requests:

1. Drop field "empty-dir"
I noted that the 'empty DictionaryForMIDs' is already included in the DfM Creator JAR file, true ? It would be great if the user wouldn't have to enter the path for the 'empty DictionaryForMIDs' but instead the one from the JAR would be used !
2. Incorporate BitmapFontGenerator
If it was possible to also incorporate BitmapFontGenerator then all tools would be available DfM Creator !
Gert
P.S.: Do you want to call it "DfM Builder" or "DfM Creator" ?