Dear Bartozs,
I found how to setup correctly the urls in the widget “News Archive”.
I added: qtrans_convertURL(nm_get_news_date_link ($date[0], $date[1]).’/’); at $link = nm_get_news_date_link ($date[0], $date[1]) in your function.php file.
I hope it will help if someone has the same issue.
Thanks again, Bartozs, for your help and for your plugin.
Cordially, Richard