Sorry, I misspoke. I was actually meaning receiving a configuration file for the CURRENT Design Extender version, as no extenders installers work on my machind.
I was not requestiong a preview of some future version! Neither you nor I would really know, when I made a supposed "eeror", if it was genuinely an error, or just me being idiotic. I don't think I am suirable material for an alpha tester!!
However, I am actually learning a great deal fighting away with html5 myself.
With every good wish,