How can I "last update" change the date format

I have found the solution itself

open q-and-a-focus-plus-faq/inc/functions.php

find (line 180)
return date('F j, Y g:i A', strtotime($post->post_modified));

replace with
return date('d.m.Y, G:i', strtotime($post->post_modified));

In order for the German date format is displayed: 01.01.2014 00:05

Solved

That will need to be changed with every new update. I will try to make it use the standard WordPress date settings in the next update.

This will be updated soon. The date should now show the format you have set in the admin settings.