Borrowed books cannot be copied on e-reader Kobo Aura HD

I download2 - 3 abd 4 adobe digital editions, i used to have only 2 and 3 , i can get to adobe id, i remember my password, cannot get help at all for adobe digital editions probably because it's free?

i want to know how can i get to transfer my borrowed books to my e-reader Kobo Aura HD. Used to be easy. Now say can't copy not authorized. OK cannot find how to autorize because they don't want to help (ADOBE) THEY SAY GO TO FORUM. Help please my name is Klodeen and i am not familiar with forums it seems now not only i have a problem but many more help!!!!!!!!!!!!!!!!!!