You made screenshots after clicking on the sub tags. But did I understand you correctly that your concern is what happens after clicking on the parent tag?
In that case, the add-on will type the search expression ("tag:0200_ARTIKEL" or "tag:0200_ARTIKEL::*") for you. This will deliver notes with the parent tag or any of the sub tags.
If you are only interested in notes with the parent tag, you can simply search for "tag:0200_ARTIKEL".
There is no such thing as directories. To Anki, tags are just strings without white space in them. The add-on only provides some convenient ways to organise your tags and filter by them, using :: as a pseudo seperator for different levels.
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