I have just moved to Flash Professional CC from CS6. I have a series of plugins that are important and I cannot seem to get them into the Extension Manager as CC won't show up in it. Is there any way I can get my CS6 plugins into CC?
contact the plugin publishers and ask them to update their plugins.
This may help, especially if it's CC 2015.
Flash CC 2015 Extensions Installer - Animation Insider
Also try this document Installing Extensions and Add Ons
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