
Version 4.5 was released in September 2015 and added support for seamless fulfillment of ebooks across devices.

Version 4.0 was released in September 2014 and added support for EPUB3. Version 3.0 was released in January 2014 and introduced more secure digital rights management and improved vertical text support.
ADOBE DIGITAL 4.5 64 BIT
In August 2011, Adobe Labs began public beta testing of accessibility features in a preview of version 1.8 that was later released as version 2.0 in September 2012. Windows Intel Pentium 4 processor or later Windows 7 (32 or 64 bit running in 32-bit mode) 512MB of RAM (1GB recommended) 40MB of available hard-disk space. The previous Digital Rights Management activator service was retired on January 1, 2009. It used Adobe ADEPT as its digital rights management (DRM) technology and became Adobe's sole officially supported e-book reader on January 1, 2008. Digital Editions is built from the ground up as a lightweight, Rich Internet Application (RIA). I wonder whether Adobe has placed a limit on how much text can be copied from an ebook. A search of the internet has located a number of similar complaints, but no solution. However, lately ctrl-c has stopped working to copy text.
ADOBE DIGITAL 4.5 UPDATE
Launched in June 2007, ADE was initially based on Adobe's Flash technology and also supported viewing of SWF documents. Adobe Digital Editions is an engaging new way to read and manage eBooks and other digital publications. Changes in ADE 4.5.9 This update resolves: The issue 'Connection Error Detected: Digital Editions could not connect to the fulfillment server. I am attempting to copy and paste R code from an ebook using Adobe Digital Editions 4.5. Adobe Digital Editions (ADE) is free-to-download and use, and completely ad-free. Renamed My Digital Editions folder to OLD and created a new My Digital Editons folder.

That single feature alone would make the program ten times better. One eBook reader for all your Adobe DRM protected books across your iPad, Mac or PC. Having issues downloading ebooks to ADE from library. It cannot be that hard to include a double page view. Adobe Digital Editions ( ADE) is an e-book reader from Adobe Systems that supports various formats such as PDF, XHMTL and EPUB. Digital editions is an embarrasment as a piece of software, painful to use and makes me think the rest of Adobe's software is just as lacking in features.
