eBooks not in My Digital Editions

Hi.  I hope you are doing well today.  🙂

I am new to Digital Editions.  I have bought several ebooks from 4-5 stores.  Unfortunately, not all of my books are being saved in My Digital Editions.  When i click on info for the books which are not being saved in My Digital Editions, it says the path is to my Downloads folder.

I would like all of my eBooks to be stored in My Digital Editions.  Please help me.

Thank you.  Take care, and have a good day.  🙂  Barbara