Some things to check:
Did you do a default setting again after you did the download? You have to let the unit know it is not going to be downloading software any more. Some software releases have start and finish default settings included in them.
In the Set up menu, put the User Mode to Advanced.
Use the Views button and scroll thru ALL of the views until you get to the one you started with. Do that in the Simulator mode so you can tell if you see a new view.
Look at the Systems Status view from the start up menu to see if that software version is shown. If it is not, download the software again from Humminbird to your computer, put it on a SD card and load in the unit again. Don't just try to reload the software you alread have. Sometimes what you download via internet gets corrupted during the download process and the unit will not accept it.
There are several views with DI in combo with other views.
The DI only view looks like this: