Although ADE 4.5 is the current, actively maintained version, version 3.0 remains in use for several specific reasons:
Tip: If you do not want your reading tracked or tied to an account, you can check the box for "I want to authorize my computer without an ID," though this limits your ability to transfer books to other devices. Troubleshooting Common ADE 3.0 Errors adobe digital editions 30 download updated