Get an updated version of koreader for Tagus Lira ebook reader (9.7’’)

Hello to everybody,

I have to use and old koreader version (2019.04.2) because the reader comes with Android 4.2.2.

I have noticed some problems (not refreshing on the first load of a book, irresponsiveness from time to time) that I guess it have a high probability of being fixed in newer versions.

Is there a way to use a newer version by making it ‘back-compatible’ with Android 4.2.2. again?

The built-in reader in this tablet sucks, so that it’s the reason I want to use an alternative, e-ink compatible app to read epubs from my Android-based e-ink reader.

Thank you for all your help !