My mistake. There is no problem.
I was looking at the date of the folder inside the downloaded archive but not the contents of the folder.
It appears I have the v3.1.2.
Apologies for the confusion.
Caution: Non registered users only see threads and messages in the currently selected language, which is determined by their browser. Please create an account and log in to see all content by default. This is a limitation of the forum software.
Also users that are not logged in can not create new threads. This is a, unfortunately needed, counter measure against spam. Please create an account and log in to start new threads.