The latest updates to my apps have lost compatibility with older Android 4.x devices. This shouldn't happen :) This is a bug related to the lack of certain system functions for the C++ library to work properly. Of course, it will be fixed in upcoming updates.

But if you need working versions of apps for this system right now, I'd like to remind you that there's an official archive containing almost every app version ever released, for both desktop and Android:

Just in case: before installing an older version, I recommend backing up the app's internal storage.