[HoMM IV DUEL TOURNAMENT ON] "Snowstorm"

Lou, does this mean that anyone can edit the map without the author's permission?

Well, no serious changes were made that would affect authorship, especially since that's relevant here. The map was edited for the needs of the tournament – no one was claiming your authorship. Besides, if I'm not mistaken, the main changes were made by Zubr (life vs life), and again, if I'm not mistaken, with your agreement as the map's author. The fact that Louchik made some minor corrections – you can read about the script error I described in one of the previous posts – this also doesn't affect your authorship in any way (honestly, I could have done it myself and finished the duel last night, but I decided it wasn't necessary, so I turned to the organizers. And if I had done it, would that also be considered plagiarism?).
This corrected map (the life vs life version) won't go beyond the scope of this forum, or even the tournament.

Moreover, it was done to speed up the tournament, in my opinion, for the benefit of all participants.

P.S. If that's the case, nothing prevents you from deleting the attachment from the post, but we will still finish the tournament using it. Or is that also prohibited?