From the user guide it mentions about application version.
Here is the output of my "show version" but I have no idea which "protocol pack" version it is.
Application file: /apps/data/scos/app/en350564.sli
Application name: Engage SML Version 3.5.0 build 182
Using Lib - PL_3.5.0_b182
Using Lib - Classifier_3.5.0_b182
Application help: Entry point of Engage