You can ask questions and discuss details of Visual Extend in our (English or German language) VFX newsgroups at news://news.dfpug.de or in the VFX-section of the dFPUG-forum at http://forum.dfpug.de . Messages are transfered vice versa so it just depends if you prefer a newsreader or a browser with a treeview for viewing messages. If you write messages in the newsgroup they will appear as text-only-messages in the forum. If you write messages in the forum you can format them and use our integrated Wiki to hyperlink to explanations. So we prefer the use of the forum...
Some additional material can be found at our portal at http://portal.dfpug.de/dfpug under the category "Werkzeuge:Visual Extend" - see at http://portal.dfpug.de/dFPUG/Kategorien/Werkzeuge/Visual Extend.