No option to enter registration Code on IOS
I have previously subscribed for Freedome on iOS via the App store.
I have now allowed that subscription to expire and instead purchased a multidevice code via the F-Secure website. However there is no possibility to enter the code into the iOS app.
I have uninstalled and reinstalled the app, even turning off the device in between uninstall and reinstall, but all I see under the subscription menu is the word "Expired" with no further options.
According to this article: https://community.f-secure.com/t5/F-Secure/How-can-I-activate-my-multi/ta-p/75821 I should instead get a prompt asking about the multidevice registration, but this never happens.
How do I enter the registration code?