Aura ONE Non-ADE downloads/Kobo app

Working with ADE to get books from kobo library to my KA1 is pretty much a non-starter...even after trying different versions of ADE.

Are there options other than ADE to get my kobo library books to my KA1? And, if so, what are they?

I seem to recall there is a reason to stay away from the kobo app? Is the kobo app viable?

Thanks.