Laurent,
I thought I would wait to see what others had to say.
The idea of a site which collated the collected wisdom of the ZTreeWin community seemed like a good idea.
A lot that is on the site is on the Forum, but it is not organised to make this readily accessible.
The number of questions which are answered by reference to earlier posts is evidence of this.
Unfortunately only about 6 people contributed (excluding Wishlist).
ZEST and ZEN contain useful information, but this is relatively narrow, and reflects the particular views of the individuals.
I thought the wiki tutorials were worthwhile, but could just as easily be included with ZTreeWin, or offered as a optional download.
TikiWiki syntax does take a little time to learn, and is not that different to other wiki syntax.
I agree the newer versions did not make it easier to use, so I can see no reason to continue with this format.
I see no need for ZTWiki to have its own domain. A page on you site (or even ztree.com or ztw3.com) would be just as good.
PS I think the Wishlist has passed its time. If anyone wants to continue this it would be better on ztree.com or ztw3.com. There is already a Wishlist category on the Forum.