After Update, Icons lost

The first change everything was changed. I then this vacuum cleaner icon, which looks like a shop icon, replaced by a private.

Now when re-update no more icon is displayed.

Why can not expect an icon which is also as download icon looks like and why is my icon disappeared as standart?

If the update already deleted my files, so it should be replaced when you can not find the icon, respetive the standard icon will be displayed.