Oh so that's why my MIL's kindle suddenly stopped working for no reason!
Sigh, I'm gonna end up having to explain jailbreaking to a 79yo, aren't I? I would really prefer not to.
Just give her a Kobo. They're pretty decent, have good battery life and you can use them in combination with Calibre for a pretty good UI.
No, as the link says it's effective May 20th...