Correct, because it's not for that Model Year. Although you say 2013, I gather you mean MY14, if so, see this - http://www.wk2jeeps.com/tsb/tsb_wk2_0803518b.pdf
These are all listed here - Jeep Grand Cherokee WK2 - 2011-2019 Grand Cherokee Service Bulletins and Recalls
I have been following your fun with the maps in that thread.
Correct, mine is a MY14 and is running the 16.16.13 version. Can this new version be flashed on my car?
PS are you located in Redcliffe?