[stumped]

I use it for over a year

Once you stop expecting a clone of the dead cc, and learn what it can, can't do. It is a very good buy.

E.g. it allows for a.view of all local copies you can open books correctly from that,no need for a local library app
I use it with a mirror of my calibre library updated into Dropbox .and with moon reader for epub, acrobat for pdf. I don't bother wifh shelves and favourites in moon reader, I use filters and sort facilities in calibre sync to find stuff.

Big positive is that the developer responds to his customers .
And if you want to download your entire library,you can. Dunno why previous commenter says u can't?

Theres not ever going to be a future complete cc clone. Some bespoke cc features were too difficult to make work with all versions of android, that's why it was sold then abandoned