How do I load books that I have in my PC back up files

Hello - sadly I have had to replace my old PC with  new one and lost my adobe Digital Editions as a result - I have just installed afrsh edition of Digital Editions and hahve my books in a back up file - so that is all good.

If you could please tell em how I get the books from this back up file in to my new version of Digital editions I would be really grateful.

I do hope some one out there can help me

Many thanks inanticipation

Keith