This question has been asked and, I think, unanswered before! I installed it to find out. It seems the functions are indeed limited.
I see few options within the menus.
Advanced provides a second menu and a back button.
Apply update provides the route to the navigate /select file tool and adb sideload.
All other selections seem to go to the action without further notice in /e/ Recovery 1.4.
I am sorry that my suggestion to wipe the cache partition is not possible with an /e/ Recovery.