An extension is a piece of software that can be added to an Adobe® application to enhance its capabilities.
The Adobe® Extension Manager provides an easy and convenient way to install and delete extensions in Adobe® applications, and to find information about extensions you installed.
Adobe® has stopped updating and maintaining Extension Manager (the full announcement can be found here, Jun 17, 2015). This means that starting from the CC2015 update (Jun 16, 2015) the Extension Manager application will no longer support the third party extensions installation process. And from now on, all my extensions (CC2105 and later) will be distributed via custom made, standalone installers. A short guides on how to install extensions for Adobe® Illustrator® CC2015 (and later) are available here: Windows, Mac OS X
Regardless of whether or not you have decided to upgrade to the latest CC2015, you can still use all previous versions of Adobe® products - CS6, CC and CC2014.1. And those applications are still supported by the Extension Manager CS6/CC. The problem is that the latest release of the Creative Cloud Desktop App (version 184.108.40.206 released on Jun 14, 2015 and updated on Jun 15, 2015) could break the ability to install extensions (using Extension Manager CC) for all previous CC (17.1) and CC 2014.1 (18.1) versions - extensions appear to be installed but some files are not copied into the correct locations. Some users have noticed this odd behavior, for example here: https://forums.adobe.com/message/7646202#7646202
To fix this you could try to reinstall the Extension Manger. Make sure all Adobe applications are shut down (Illustrator®, Photoshop®, Extension Manager, etc.), go to your Creative Cloud Desktop App, select Apps and find Extension Manger CC on the list. Click on it – a small settings icon should appear. Hit the Down-Arrow and choose Uninstall. Once the application has been removed from your system, go back to the Creative Cloud Desktop App, select Apps, go to Previous Versions section and choose Extension Manger CC. Hit Install button. Now all your CC (17.1) and CC 2014.1 (18.1) extensions should install correctly.
If you haven't already installed Adobe® Extension Manager in your system, please go to:
• CS6 Users: adobe.com/exchange/em_download/em6_download.html
• CC, and CC 2014 Users: adobe.com/exchange/em_download (or creative.adobe.com/products/extension-manager )
to install it manually, or simply do it via the Adobe® Creative Cloud™ desktop control panel (learn more here: helpx.adobe.com/creative-cloud/help/creative-cloud-desktop.html):
Before you start, make sure your version of Adobe® Extension Manager matches the version of the products you are extending. For example, use the latest version of Adobe® Extension Manager CC (version 7.2) to install extensions in Adobe® Illustrator® CC 2014.1 (18.1) or CC (17.0, 17.1). If you are extending Adobe® Illustrator® CS6 use Adobe® Extension Manager CS6 (version 6.0).
Double-click the downloaded installation package file (XXXXX.bundle.zxp) in Windows® Explorer (Windows) or in the Finder (Mac OS). This will automatically launch the Adobe® Extension Manager application. Follow the onscreen instructions.
Manually launch Adobe® Extension Manager application
Go to File > Install Extension and pick the installation package file download from our website: XXXXX.bundle.zxp
Adobe® Extension Manager informs you that you are about to install the extension from an unverified publisher Pawel Kuc, cn=Pawel Kuc, ou=Developer Team, o=63mutants. This is because we are not a verified Adobe® Systems, Inc. publisher. We create independently.
The installation process requires administrative privileges
On successful installation, the extension is added to the list and a short description of the installed tool appears in the lower portion of the Adobe® Extension Manager workspace.
Note that for some types of extensions, the changes only take effect after you close and restart the application.