3. Assign an item to select more than one category.
I have aready told you how to do this in jD. Use the Batch approach. Arno is working on V4 so there is no chance of any other way. It does what you want in a different way. Whichever way one does these things there is always work involved in using it!!
Have you tried it - easy when you do it
Created the extra catgories first then populate them. But is it a language aspect?
Possibility to use multiple categories on a single menu.
I do not sure I fully understand what you mean or why you would need it.
Truncate the item descriptions when showing all downloads, as you know about that. It will help to make it the front page instead of the modules.
I will look into this if possible but I am trying to get 3.9.8 ready.
As part of 3.9.8 most of the modules have been re-written, mainly to meet WCAG requirements but I have also introduced a module css. They also use a div structure rather than a table structure so that gives added flexibility. Thetree module has not changed.Have you considered using that as it shows the category structure very well.
I have been looking at a random module but ran out of time
Disagree with you about the Related module. It offer two types of relationships