You can install plugins or extensions (also called add-ons) for Creative Cloud applications from the Creative Cloud desktop app. Adobe Extension Manager is no longer available to install plugins.
Before you install a plugin or extension, make sure that you have installed the Creative Cloud app to which you are adding it. For example, if you are installing an extension for Photoshop, install Photoshop first.
If you are trying to install your plugin or extension oon a device that runs on ARM processors, you won't be able to view the Marketplace tab in the Creative Cloud desktop app.
To learn more, see Will Adobe apps work on Windows computers that use ARM processors?
Some plugins or extensions are installed as panels inside the Creative Cloud apps, while some others are installed in the form of zipped files. To know where you can find your installed plugin or extension, go to the Adobe Exchange website and select your plugin or extension. Scroll down to the bottom of the webpage and navigate to the section Where to Find it. This section provides the location details of the plugin or extension after it has been installed.