Signing up for the new VIB loyalty scheme and navigating to 'Use My Club Goods' gives a bunch of 'Launch Hook Up' deals.
Also note you might receive two deals on the spud fries, one of which expires before the other (two weeks after receiving), so if you plan on eating a lot of burgers this month, maybe use that one first.
Once you are signed up to the new VIB club you can order online - doesn't have to be via the app.
The old app is no longer for anyone that was a VIB member previously so you need to sign up to the new programme.
Here is a screenshot showing the four free options available and their respective exclusions when you purchase a large burger.
Note: Only one can be used at a time.