Hi. Let's assume we download a torrent that consists of a folder with files in it.
If we now right click on it and select Local Files - Delete - everything will be deleted, including folder. Good.
Now if we'll delete/move some of the files and repeat the procedure - tixati will delete folder+files in it. Good.
Now we delete/move ALL the files, but will keep the folder and repeat the procedure - tixati will NOT delete the folder.

So the request is: make it remove empty leftover folder too.

When you re-direct a whole transfer folder.
Tixati no longer links to the OLD folder. Therefore you're asking a moot point. Use folders in per-category settings.
This allows you to at least keep track of smaller not "all downloads" folder. :)