[Update: Adobe added a warning to the CC updater that informs the user that older versions of Acrobat will be removed, and a knowledge base article about this problem: https://helpx.adobe.com/creative-cloud/kb/acrobat-dc-uninstalls-acrobat-11.html ]
As announced by Adobe a few weeks ago, they released Adobe Acrobat DC and last night. If you have a Creative Cloud subscription, you can get Acrobat DC today – with just one mouse click. You may want to hold off upgrading Acrobat XI to DC for a few moments and save all custom elements that you installed in Acrobat XI: The upgrade will remove Acrobat XI completely from your system, and with it all custom scripts, stamps, plug-ins and other things that you may have installed for all users in Acrobat’s application directory.
Before you upgrade, find out where Acrobat XI is installed on your computer (on a Mac, that would be /Applications/Adobe Acrobat XI Pro, on a Windows system it may be C:\Program Files (x86)\Adobe\Acrobat 11.0\Acrobat) and save all these custom elements to a different directory.
Once you’ve done that, feel free to click on that “Upgrade” button. You can now install these plug-ins, stamps, scripts, … back into the new Acrobat DC application directory.
If you’ve already upgraded, then you will have to use your backup to recover these files.
Keep in mind that the user interface of Acrobat DC is completely different than what you had with Acrobat XI, so plan for some serious hunting for tools that you could find blindfolded… The tool search function on the right hand pane is our friend.
More about Adobe Acrobat DC soon…