is the developer alive? – KyBook 3 Ebook Reader Review

i see reviews on github with people having the same issue i am having with the app, unresolved since september 2019. i cancelled my subscription for 1 year just in time to not be charged the 15 $. i love the way this app is laid out, and i get that this guy has been developing this app for a long time, and code re writes are extremely difficult, but if he has moved onto greener pastures of doing other things, it should be noted in this description or on github so people dont pay for stuff that is broken.
Review by xyz_ on KyBook 3 Ebook Reader.