Moved from Sony to kobo

Hi I've moved from a Sony ereaders to a kobo. ive lost the DRM on the books I bought for my Sony and can't move them to my kobo. Ive downloaded digital editions, but can't transfer the books into D.E.  as I need to enter an adobe password and can't remember what it was and the email address I think might have been associated with it no longer exists.......I know it's a mess but don't want to lose those books....