Primitive software?

I just downloaded digital Editions because Temple Univ Press had me download it to read their ebooks.  I have everything downloaded.  To read a book I have to use a pull down menu to advance a page or to go back.  This may have been okay back in the 80's, but not today.  Every other reader I use now you can click at the edge of a page or swipe the page to turn pages.  Am I missing something here?  I can't imagine even Adobe being this primitive.