Ok, I want to leave feedback on 1 change and 1 new feature regarding the subject of 'Looping' files:
1. Ok, on this setting here...

I think this would be better renamed as Loop the file list in Viewer
...this rename would better communicate to the user what this setting is IMO. I also took the liberty of translating this text to French and German to see if the language translation would be too spacious - what do you think?
de/german - Loop die Dateiliste im Viewer
fr/french - Boucle la liste des fichiers dans l'Observateur
2. Pierre, It would be nice if you could also add a Loop setting for the 'Page list' of a file with pages. I always wondered about this in Xnview win but never thought to ask. I made the following picture to show you what it would look like;
